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Document and Entity Information - shares	6 Months Ended
Document and Entity Information - shares	Jun. 30, 2018	Jul. 27, 2018
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2018
Document Fiscal Year Focus	2018
Document Fiscal Period Focus	Q2
Entity Registrant Name	MRC GLOBAL INC.
Entity Central Index Key	0001439095
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Common Stock [Member]
Entity Common Stock, Shares Outstanding		90,315,224
Restricted Stock [Member]
Entity Common Stock, Shares Outstanding		87,247

Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash	$ 31	$ 48
Accounts receivable, net	676	522
Inventories, net	872	701
Other current assets	39	47
Total current assets	1,618	1,318
Other assets	21	21
Property, plant and equipment, net	147	147
Intangible assets:
Goodwill, net	485	486
Other intangible assets, net	345	368
Total assets	2,616	2,340
Current liabilities:
Trade accounts payable	527	415
Accrued expenses and other current liabilities	136	143
Current portion of long-term debt	4	4
Total current liabilities	667	562
Long-term obligations:
Long-term debt, net	704	522
Deferred income taxes	102	106
Other liabilities	38	36
Commitments and contingencies
6.5% Series A Convertible Perpetual Preferred Stock, $0.01 par value; authorized 363,000 shares; 363,000 shares issued and outstanding	355	355
Stockholders' equity:
Common stock, $0.01 par value per share: 500 million shares authorized, 104,923,720 and 103,099,692 issued, respectively	1	1
Additional paid-in capital	1,714	1,691
Retained deficit	(520)	(548)
Less: Treasury stock at cost: 14,622,930 and 11,751,726 shares, respectively	(225)	(175)
Accumulated other comprehensive loss	(220)	(210)
Total stockholders' equity	750	759
Total liabilities and stockholders' equity	$ 2,616	$ 2,340

Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Condensed Consolidated Balance Sheets [Abstract]
Preferred stock, dividend rate	6.50%	6.50%
Preferred stock, par value	$ 0.01	$ 0.01
Preferred stock, shares authorized	363,000	363,000
Preferred stock, shares issued	363,000	363,000
Preferred stock, shares outstanding	363,000	363,000
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	500,000,000	500,000,000
Common stock, shares issued	104,923,720	103,099,692
Treasury stock, shares	14,622,930	11,751,726

Condensed Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Condensed Consolidated Statements of Operations [Abstract]
Sales	$ 1,082	$ 922	$ 2,092	$ 1,784
Cost of sales	905	773	1,746	1,495
Gross profit	177	149	346	289
Selling, general and administrative expenses	136	132	274	258
Operating income	41	17	72	31
Other expense:
Interest expense	(10)	(8)	(18)	(15)
Write off of debt issuance costs	(1)		(1)
Other, net			2
Income before income taxes	30	9	55	16
Income tax expense	8	3	15	4
Net income	22	6	40	12
Series A preferred stock dividends	6	$ 6	12	$ 12
Net income attributable to common stockholders	$ 16		$ 28
Basic income per common share	$ 0.18		$ 0.31
Diluted income per common share	$ 0.17		$ 0.30
Weighted-average common shares, basic	90.1	94.5	90.7	94.6
Weighted-average common shares, diluted	91.6	95.6	92.7	96.0

Condensed Consolidated Statements of Other Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Condensed Consolidated Statements of Other Comprehensive Income [Abstract]
Net income	$ 22	$ 6	$ 40	$ 12
Other comprehensive (loss) income
Foreign currency translation adjustments	(9)	8	(10)	14
Hedge accounting adjustments	1
Total other comprehensive (loss) income, net of tax	(8)	8	(10)	14
Comprehensive income	$ 14	$ 14	$ 30	$ 26

Condensed Consolidated Statements of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Operating activities
Net income	$ 40	$ 12
Adjustments to reconcile net income to net cash used in operations:
Depreciation and amortization	12	11
Amortization of intangibles	22	22
Equity-based compensation expense	7	9
Deferred income tax benefit	(4)	(7)
Amortization of debt issuance costs	1	2
Write off of debt issuance costs	1
Increase in LIFO reserve	22	6
Foreign currency losses (gains)	1	(2)
Other	(1)	4
Changes in operating assets and liabilities:
Accounts receivable	(157)	(117)
Inventories	(201)	(33)
Other current assets	12	7
Accounts payable	116	68
Accrued expenses and other current liabilities	(10)	(6)
Net cash used in operations	(139)	(24)
Investing activities
Purchases of property, plant and equipment	(9)	(14)
Net cash used in investing activities	(9)	(14)
Financing activities
Payments on revolving credit facilities	(475)	(223)
Proceeds from revolving credit facilities	659	223
Payments on long-term obligations	(2)	(4)
Debt issuance costs paid	(1)
Purchase of common stock	(50)	(18)
Dividends paid on preferred stock	(12)	(12)
Repurchases of shares to satisfy tax withholdings	(5)	(3)
Proceeds from exercise of stock options	20
Net cash provided by (used in) financing activities	134	(37)
Decrease in cash	(14)	(75)
Effect of foreign exchange rate on cash	(3)	3
Cash -- beginning of period	48	109
Cash -- end of period	31	37
Supplemental disclosures of cash flow information:
Cash paid for interest	18	13
Cash paid for income taxes	$ 22	$ 22

Background and Basis of Presentation	6 Months Ended
Background and Basis of Presentation	Jun. 30, 2018
Background and Basis of Presentation [Abstract]
Background and Basis of Presentation	NOTE 1 – BACKGROUND AND BASIS OF PRESENTATION Business Operations: MRC Global Inc. is a holding company headquartered in Houston, Texas. Our wholly owned subsidiaries are global distributors of pipe, valves, fittings (“PVF”) and related products and services across each of the upstream (exploration, production and extraction of underground oil and gas), midstream (gathering and transmission of oil and gas, gas utilities, and the storage and distribution of oil and gas) and downstream (crude oil refining and petrochemical and chemical processing and general industrials) sectors. We have branches in principal industrial, hydrocarbon producing and refining areas throughout the United States, Canada, Europe, Asia, Australasia, the Middle East and Caspian. Our products are obtained from a broad range of suppliers. Basis of Presentation: We have prepared our unaudited condensed consolidated financial statements in accordance with Rule 10-01 of Regulation S-X for interim financial statements. These statements do not include all information and footnotes that generally accepted accounting principles require for complete annual financial statements. However, the information in these statements reflects all normal recurring adjustments which are, in our opinion, necessary for a fair presentation of the results for the interim periods. The results of operations for the three and six months ended June 30, 2018 are not necessarily indicative of the results that will be realized for the fiscal year ending December 31, 2018. We have derived our condensed consolidated balance sheet as of December 31, 2017 from the audited consolidated financial statements for the year ended December 31, 2017. You should read these condensed consolidated financial statements in conjunction with the audited consolidated financial statements and notes thereto for the year ended December 31, 2017. The consolidated financial statements include the accounts of MRC Global Inc. and its wholly owned and majority owned subsidiaries (collectively referred to as the “Company” or by such terms as “we,” “our” or “us”). All material intercompany balances and transactions have been eliminated in consolidation. Recent Accounting Pronouncements: In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2016-02, Leases, which will replace the existing guidance in ASC 870, Leases. This ASU requires a dual approach for lessee accounting under which a lessee would account for leases as finance leases or operating leases. Both finance leases and operating leases will result in the lessee recognizing a right-of-use asset and a corresponding lease liability. For finance leases, the lessee would recognize interest expense and amortization of the right-of-use asset, and for operating leases, the lessee would recognize a straight-line total lease expense. This guidance is effective for annual and interim reporting periods of public entities beginning after December 15, 2018. Therefore, we will adopt the standard in the first quarter of 2019. We are in the process of evaluating the effect of the adoption of ASU 2016-02 on our consolidated financial statements. We believe the recognition of right-of-use assets and lease liabilities will result in material increases in assets and liabilities reflected on our consolidated balance sheets. We do not expect the adoption of ASU 2016-02 to have a material impact on our consolidated statements of operations and cash flows. Adoption of New Accounting Standards: ASU 2014-09, Revenue - Revenue from Contracts with Customers. On January 1, 2018, we adopted ASU 2014-09 and all the related amendments, (collectively, “ASC 606”) using the modified retrospective method. Under this method, a cumulative effect of initially applying the new revenue standard requires an adjustment to the opening balance of retained earnings, and the comparative information continues to be reported under the accounting standards in effect for those periods prior to adoption. The cumulative effect of initially applying the new standard was not material to our consolidated financial statements. We do not expect the adoption of this guidance to have a material effect on our results of operations in future periods. ASU 2017-12, Accounting for Derivatives and Hedging Transactions (Topic 815) Targeted Improvements to Accounting for Hedging Activities. In March 2018, we early adopted ASU 2017-12. The new standard amends the hedge accounting model to better portray an organization’s risk management activities in the financial statements, as well as simplifies the applications of certain hedge accounting guidance. The implementation of ASU 2017-12 did not have a material impact on our consolidated financial statements.

Revenue Recognition

6 Months Ended

Jun. 30, 2018

Revenue Recognition [Abstract]

Revenue Recognition

NOTE 2 – REVENUE RECOGNITION

Revenue is recognized when control of promised goods or services is transferred to our customers in an amount that reflects the consideration to which we expect to be entitled in exchange for those goods or services. Substantially all of our revenue is recognized when products are shipped or delivered to our customers, and payment is due from our customers at the time of billing with a majority of our customers having 30-day terms. Returns are estimated and recorded as a reduction of revenue. Amounts received in advance of shipment are deferred and recognized when the performance obligations are satisfied. Sales taxes collected from customers and remitted to governmental authorities are accounted for on a net basis and, therefore, are excluded from sales in the accompanying consolidated statements of operations. Cost of sales includes the cost of inventory sold and related items, such as vendor rebates, inventory allowances and reserves, and shipping and handling costs associated with inbound and outbound freight, as well as depreciation and amortization and amortization of intangible assets. In some cases, particularly with third party pipe shipments, shipping and handling costs are considered separate performance obligations, and as such, the revenue and cost of sales are recorded when the performance obligation is fulfilled.

Our contracts with customers ordinarily involve performance obligations that are one year or less. Therefore, we have applied ASC 606’s optional exemption that permits the omission of information about our unfulfilled performance obligations as of the balance sheet dates.

Contract Balances: Variations in the timing of revenue recognition, invoicing and receipt of payment result in categories of assets and liabilities that include invoiced accounts receivable, uninvoiced accounts receivable, contract assets and deferred revenue (contract liabilities) on the consolidated balance sheets.

Generally, revenue recognition and invoicing occur simultaneously as we transfer control of promised goods or services to our customers. We consider contract assets to be accounts receivable when we have an unconditional right to consideration and only the passage of time is required before payment is due. In certain cases, particularly those involving customer-specific documentation requirements, invoicing is delayed until we are able to meet the documentation requirements. In these cases, we recognize a contract asset separate from accounts receivable until those requirements are met, and we are able to invoice the customer. Our contract asset balance associated with these requirements, as of June 30, 2018 and December 31, 2017, was $36 million and $31 million, respectively. These contract asset balances are included within accounts receivable in the accompanying consolidated balance sheets.

We record contract liabilities, or deferred revenue, when cash payments are received from customers in advance of our performance, including amounts which are refundable. The deferred revenue balance at June 30, 2018 and December 31, 2017 was $31 million and $30 million, respectively. During the six months ended June 30, 2018, we recognized $1 million of revenue that was deferred as of December 31, 2017. Deferred revenue balances are included within accrued expenses and other current liabilities in the accompanying consolidated balance sheets.

Disaggregated Revenue: Our disaggregated revenue represents our business of selling PVF to the energy sector across each of the upstream (exploration, production and extraction of underground oil and gas), midstream (gathering and transmission of oil and gas, gas utilities, and the storage and distribution of oil and gas) and downstream (crude oil refining and petrochemical and chemical processing and general industrials) markets in each of our reportable segments. Each of our end markets and geographical reportable segments are impacted and influenced by varying factors, including macroeconomic environment, commodity prices, maintenance and capital spending, and exploration and production activity. As such, we believe that this information is important in depicting the nature, amount, timing and uncertainty of our contracts with customers.

The following table presents our revenue disaggregated by revenue source (in millions):


Three Months Ended
June 30,

	U.S.		Canada		International		Total
2018:
Upstream	$	189	$	64	$	54	$	307
Midstream		454		8		10		472
Downstream		235		8		60		303
	$	878	$	80	$	124	$	1,082
2017:
Upstream	$	159	$	50	$	49	$	258
Midstream		379		14		27		420
Downstream		182		5		57		244
	$	720	$	69	$	133	$	922


Six Months Ended
June 30,

	U.S.		Canada		International		Total
2018:
Upstream	$	367	$	121	$	121	$	609
Midstream		847		22		13		882
Downstream		470		15		116		601
	$	1,684	$	158	$	250	$	2,092
2017:
Upstream	$	299	$	111	$	93	$	503
Midstream		725		25		41		791
Downstream		362		10		118		490
	$	1,386	$	146	$	252	$	1,784

Inventories

6 Months Ended

Jun. 30, 2018

Inventories [Abstract]

Inventories

NOTE 3 – INVENTORIES

The composition of our inventory is as follows (in millions):


	June 30,		December 31,
	2018		2017
Finished goods inventory at average cost:
Valves, automation, measurement and instrumentation	$	331	$	292
Carbon steel pipe, fittings and flanges		355		268
All other products		337		270
		1,023		830
Less: Excess of average cost over LIFO cost (LIFO reserve)		(117)		(95)
Less: Other inventory reserves		(34)		(34)
	$	872	$	701

Long-Term Debt

6 Months Ended

Jun. 30, 2018

Long-Term Debt [Abstract]

Long-Term Debt

NOTE 4 – LONG-TERM DEBT

The components of our long-term debt are as follows (in millions):


	June 30,		December 31,
	2018		2017
Senior Secured Term Loan B, net of discount and issuance costs of $3	$	395	$	397
Global ABL Facility		313		129
		708		526
Less: current portion		4		4
	$	704	$	522

Senior Secured Term Loan B: We have a seven-year Senior Secured Term Loan B (the “Term Loan”) with an original principal amount of $400 million, which amortizes in equal quarterly installments of 1% per year with the balance payable in September 2024, when the facility matures. The Term Loan allows for incremental increases in facility size by up to an aggregate of $200 million, plus an additional amount such that the Company’s first lien leverage ratio (as defined under the Term Loan) would not exceed 4.00 to 1.00. MRC Global (US) Inc. is the borrower under this facility, which is guaranteed by MRC Global Inc. as well as all of its wholly owned U.S. subsidiaries. In addition, it is secured by a second lien on the assets securing our Global ABL Facility, defined below, (which includes accounts receivable, inventory and related assets) and a first lien on substantially all of the other assets of MRC Global Inc. and those of its U.S. subsidiaries, as well as a pledge of all of the capital stock of our domestic subsidiaries and 65% of the capital stock of first tier, non-U.S. subsidiaries. We are required to repay the Term Loan with certain asset sales and insurance proceeds, certain debt proceeds and 50% of excess cash flow, as defined in the Term Loan, (reducing to 25% if our first lien leverage ratio is no more than 2.75 to 1.00 and 0% if our first lien leverage ratio is no more than 2.50 to 1.00). In addition, the Term Loan contains a number of customary restrictive covenants.

In May 2018, the Company entered into Refinancing Amendment No. 2 relating to the Term Loan. Pursuant to this amendment, the Company and the other parties thereto agreed to reduce the interest rate margin applicable to term loans, in the case of loans incurring interest based on the base rate, from 250 basis points to 200 basis points, and in the case of loans incurring interest based on LIBOR, from 350 basis points to 300 basis points. The parties to the amendment also agreed to reduce the base rate ‘floor’ from 2.00% to 1.00% and to reduce the LIBOR ‘floor’ from 1.00% to 0.00%. The parties also reset the prepayment premium applicable to voluntary prepayments of the term loans such that repayments made in connection with certain re-pricing transactions will be subject to a 1% premium if made during the first six-months following the date of the amendment. Except as described above, the terms of the Term Loan Agreement generally were not modified as a result of the amendment.

Global ABL Facility: We have an $800 million multi-currency asset-based revolving credit (the “Global ABL Facility”) that matures in September 2022. This facility is comprised of $675 million in revolver commitments in the United States, $65 million in Canada, $18 million in Norway, $15 million in Australia, $13 million in the Netherlands, $7 million in the United Kingdom and $7 million in Belgium. It contains an accordion feature that allows us to increase the principal amount of the facility by up to $200 million, subject to securing additional lender commitments. MRC Global Inc. and each of its current and future wholly owned material U.S. subsidiaries guarantee the obligations of our borrower subsidiaries under the Global ABL Facility. Additionally, each of our non-U.S. borrower subsidiaries guarantees the obligations of our other non-U.S. borrower subsidiaries under the Global ABL Facility. Outstanding obligations are generally secured by a first priority security interest in accounts receivable, inventory and related assets. Excess Availability, as defined under our Global ABL Facility, was $414 million as of June 30, 2018.

Interest on Borrowings: The interest rates on our borrowings outstanding at June 30, 2018 and December 31, 2017, including a floating to fixed interest rate swap and amortization of debt issuance costs, were as set forth below. On a comparable basis, the weighted average interest rate at March 31, 2018 was 5.15%.


	June 30,		December 31,
	2018		2017
Senior Secured Term Loan B		5.60%		5.18%
Global ABL Facility		3.77%		3.19%
Weighted average interest rate		4.79%		4.69%

Income Taxes	6 Months Ended
Income Taxes	Jun. 30, 2018
Income Taxes [Abstract]
Income Taxes	NOTE 5 – INCOME TAXES For interim periods, our income tax expense is computed based upon our estimated annual effective tax rate and any discrete items that impact the interim periods. Our effective tax rates for the three and six months ended June 30, 2018 were each 27% and for the three and six months ended June 30, 2017 were 33% and 25%, respectively. Our rates generally differ from the U.S. federal statutory rates of 21% and 35% for the six months ended June 30, 2018 and 2017, respectively, as a result of state income taxes and differing foreign income tax rates. The 2018 effective tax rate exceeds the U.S. statutory rate primarily as a result of pre-tax losses in certain foreign jurisdictions with no corresponding tax benefit. The 2017 effective tax rate was below the U.S. statutory rate as a result of a benefit related to the foreign currency exchanges losses and the adoption of ASU 2016-09, Compensation – Stock Compensation, which resulted in a discrete tax benefit of $2 million related to the vesting of stock awards. As of December 31, 2017, we recorded provisional tax estimates associated with the passage of the Tax Cuts and Jobs Act of 2017 (the “Tax Act”). These provisional amounts included a $57 million benefit for the re-measurement of deferred tax assets and liabilities and a $7 million transition tax expense related to undistributed foreign earnings. In accordance with the Securities and Exchange Commission’s Staff Accounting Bulletin No. 118 (“SAB 118”), these provisional amounts will be finalized during 2018. Any adjustments required to the provisional amounts will be reflected in income tax expense in the period the adjustment is identified.

Redeemable Preferred Stock	6 Months Ended
Redeemable Preferred Stock	Jun. 30, 2018
Redeemable Preferred Stock [Abstract]
Redeemable Preferred Stock	NOTE 6 – REDEEMABLE PREFERRED STOCK Preferred Stock Issuance In June 2015, we issued 363,000 shares of Series A Convertible Perpetual Preferred Stock (the “Preferred Stock”) and received proceeds of $355 million, net of transaction fees. The Preferred Stock ranks senior to our common stock with respect to dividend rights and rights on liquidation, winding-up and dissolution. The Preferred Stock has a stated value of $1,000 per share, and holders of Preferred Stock are entitled to cumulative dividends payable quarterly in cash at a rate of 6.50% per annum. Holders of Preferred Stock are entitled to vote together with the holders of the common stock as a single class, in each case, on an as-converted basis, except where a separate class vote of the common stockholders is required by law. Holders of Preferred Stock have certain limited special approval rights, including with respect to the issuance of pari passu or senior equity securities of the Company. The Preferred Stock is convertible at the option of the holders into shares of common stock at an initial conversion rate of 55.9284 shares of common stock for each share of Preferred Stock, which represents an initial conversion price of $17.88 per share of common stock, subject to adjustment. On or after the fifth anniversary of the initial issuance of the Preferred Stock, the Company will have the option to redeem, in whole but not in part, all the outstanding shares of Preferred Stock at 105% of par value, subject to certain redemption price adjustments on the basis of the date of the conversion. After the seventh anniversary of the initial issuance of Preferred Stock, the Company will have the option to redeem all of the outstanding shares of Preferred Stock at par value. We may elect to convert the Preferred Stock, in whole but not in part, into the relevant number of shares of common stock on or after the 54th month after the initial issuance of the Preferred Stock if the last reported sale price of the common stock has been at least 150% of the conversion price then in effect for a specified period. The conversion rate is subject to customary anti-dilution and other adjustments. Holders of the Preferred Stock may, at their option, require the Company to repurchase their shares in the event of a fundamental change, as defined in the agreement. The repurchase price is based on the original $1,000 per share purchase price except in the case of a liquidation in which case they would receive the greater of $1,000 per share and the amount that would be received if they held common stock converted at the conversion rate in effect at the time of the fundamental change. Because this feature could require redemption as a result of the occurrence of an event not solely within the control of the Company, the Preferred Stock is classified as temporary equity on our balance sheet.

Stockholders' Equity

6 Months Ended

Jun. 30, 2018

Stockholders' Equity [Abstract]

Stockholders' Equity

NOTE 7 – STOCKHOLDERS’ EQUITY

Share Repurchase Program

In November 2015, the Company’s board of directors authorized a share repurchase program for common stock up to $100 million, which was increased in November 2016 to $125 million. In the first quarter of 2017, the Company completed the repurchase of all shares authorized under the program.

In October 2017, the Company’s board of directors authorized a new share repurchase program for common stock of up to $100 million. In the second quarter of 2018, the Company completed the repurchases of all shares authorized under this program.


Summary of share repurchase activity under the repurchase program:

	Three Months Ended				Six Months Ended
	June 30,		June 30,		June 30,		June 30,
	2018		2017		2018		2017
Number of shares acquired on the open market		1,144,379		-		2,871,204		859,830
Average price per share	$	17.39	$	-	$	17.39	$	20.54
Total cost of acquired shares (in millions)	$	20	$	-	$	50	$	18

In total, under both programs, we have acquired 14,622,930 shares at an average price per share of $15.38 for a total cost of $225 million. There were 90,300,790 shares of common stock outstanding as of June 30, 2018.

Equity Compensation Plans

Our 2011 Omnibus Incentive Plan originally had 3,250,000 shares reserved for issuance under the plan. In April 2015, our shareholders approved an additional 4,250,000 shares for reservation for issuance under the plan. The plan permits the issuance of stock options, stock appreciation rights, restricted stock, restricted stock units, performance shares, performance units and other stock-based and cash-based awards. Since the adoption of the 2011 Omnibus Incentive Plan, the Company’s Board of Directors has periodically granted stock options, restricted stock awards, restricted stock units and performance share units to directors and employees. Options and stock appreciation rights may not be granted at prices less than the fair market value of our common stock on the date of the grant, nor for a term exceeding ten years. For employees, vesting generally occurs over a three to five year period on the anniversaries of the date specified in the employees’ respective stock option, restricted stock award, restricted stock unit and performance share unit award agreements, subject to accelerated vesting under certain circumstances set forth in the agreements. Vesting for directors generally occurs on the one-year anniversary of the grant date. In 2018, 222,435 performance share unit awards, 505,297 shares of restricted stock units and 81,542 shares of restricted stock have been granted to employees and members of our board of directors. To date, since the plan’s inception in 2011, before consideration of forfeitures, 6,680,204 shares have been granted to management, members of our board of directors and key employees under this plan. A Black-Scholes option-pricing model is used to estimate the fair value of the stock options. A Monte Carlo simulation is completed to estimate the fair value of performance share unit awards with a stock price performance component. We expense the fair value of all equity grants, including performance share unit awards, on a straight-line basis over the vesting period.

Accumulated Other Comprehensive Loss

Accumulated other comprehensive loss in the accompanying consolidated balance sheets consists of the following (in millions):



	June 30,		December 31,
	2018		2017
Currency translation adjustments	$	(219)	$	(209)
Pension related adjustments		(1)		(1)
Accumulated other comprehensive loss	$	(220)	$	(210)

Earnings per Share

Earnings per share are calculated in the table below (in millions, except per share amounts).



	Three Months Ended				Six Months Ended
	June 30,		June 30,		June 30,		June 30,
	2018		2017		2018		2017
Net income	$	22	$	6	$	40	$	12
Less: Dividends on Series A Preferred Stock		6		6		12		12
Net income attributable to common stockholders	$	16	$	-	$	28	$	-

Weighted average basic shares outstanding		90.1		94.5		90.7		94.6
Effect of dilutive securities		1.5		1.1		2.0		1.4
Weighted average diluted shares outstanding		91.6		95.6		92.7		96.0

Net income per share:
Basic	$	0.18	$	-	$	0.31	$	-
Diluted	$	0.17	$	-	$	0.30	$	-

Equity awards and shares of Preferred Stock are disregarded in the calculation of diluted earnings per share if they are determined to be anti-dilutive. For the three and six months ended June 30, 2018 and June 30, 2017 all of the shares of the Preferred Stock were anti-dilutive. For the three and six months ended June 30, 2018, we had approximately 3.2 million and 3.5 million anti-dilutive stock options, respectively. For the three and six months ended June 30, 2017, we had approximately 2.1 million anti-dilutive stock options. There were no anti-dilutive restricted stock, restricted units or performance stock unit awards for the three and six months ended June 30, 2018 and 2017.

Segment Information

6 Months Ended

Jun. 30, 2018

Segment Information [Abstract]

Segment Information

NOTE 8 – SEGMENT INFORMATION

Our business is comprised of four operating segments: U.S. Eastern Region and Gulf Coast, U.S. Western Region, Canada and International. Our International segment consists of our operations outside of the U.S. and Canada. These segments represent our business of selling PVF to the energy sector across each of the upstream (exploration, production and extraction of underground oil and gas), midstream (gathering and transmission of oil and gas, gas utilities, and the storage and distribution of oil and gas) and downstream (crude oil refining and petrochemical and chemical processing and general industrials) markets. Our two U.S. operating segments have been aggregated into a single reportable segment based on their economic similarities. As a result, we report segment information for the U.S., Canada and International.

The following table presents financial information for each reportable segment (in millions):


	Three Months Ended				Six Months Ended
	June 30,		June 30,		June 30,		June 30,
	2018		2017		2018		2017
Sales
U.S.	$	878	$	720	$	1,684	$	1,386
Canada		80		69		158		146
International		124		133		250		252
Consolidated sales	$	1,082	$	922	$	2,092	$	1,784

Operating income
U.S.	$	37	$	21	$	65	$	32
Canada		2		1		4		4
International		2		(5)		3		(5)
Total operating income		41		17		72		31

Interest expense		(10)		(8)		(18)		(15)
Other, net		(1)		-		1		-
Income before income taxes	$	30	$	9	$	55	$	16


					June 30,		December 31,
					2018		2017
Total assets
U.S.					$	2,244	$	1,970
Canada						152		162
International						220		208
Total assets					$	2,616	$	2,340

Our sales by product line are as follows (in millions):


	Three Months Ended				Six Months Ended
	June 30,		June 30,		June 30,		June 30,
Type	2018		2017 (1)		2018		2017 (1)
Line pipe	$	212	$	170	$	370	$	316
Carbon steel fittings and flanges		178		139		349		262
Total carbon steel pipe, fittings and flanges		390		309		719		578
Valves, automation, measurement and instrumentation		375		327		753		649
Gas products		147		125		271		241
Stainless steel and alloy pipe and fittings		49		50		102		91
General oilfield products		121		111		247		225
	$	1,082	$	922	$	2,092	$	1,784

(1)

$18 million of sales for the three months ended June 30, 2017 and $36 million of sales for the six months ended June 30, 2017 have been reclassified from gas products to general oilfield products to conform with the current year presentation.

Fair Value Measurements	6 Months Ended
Fair Value Measurements	Jun. 30, 2018
Fair Value Measurements [Abstract]
Fair Value Measurements	NOTE 9 – FAIR VALUE MEASUREMENTS From time to time, we use derivative financial instruments to help manage our exposure to interest rate risk and fluctuations in foreign currencies. Interest Rate Swap: In March 2018, we entered into a five-year interest rate swap that became effective on March 31, 2018, with a notional amount of $250 million from which the Company will receive payments at 1-month LIBOR and make monthly payments at a fixed rate of 2.7145% with settlement and reset dates on or near the last business day of each month until maturity. The fair value of the swap at inception was zero. We have designated the interest rate swap as an effective cash flow hedge utilizing the guidance under ASU 2017-12. As such, the valuation of the interest rate swap is recorded as an asset or liability, and the gain or loss on the derivative is recorded as a component of other comprehensive income. Interest rate swap agreements are reported at fair value utilizing Level 2 inputs. We obtain dealer quotations to value our interest rate swap agreements. The fair value of our interest rate swap is estimated based on the present value of the difference between expected cash flows calculated at the contracted interest rates and the expected cash flows at current market interest rates. We recognize interest rate swaps on the accompanying balance sheet at fair value using observable inputs such as yield curves and other market-based factors. The fair value of the interest rate swap was $0 million as of June 30, 2018. Foreign Exchange Forward and Option Contracts: Foreign exchange forward contracts are reported at fair value utilizing Level 2 inputs, as the fair value is based on broker quotes for the same or similar derivative instruments. Our foreign exchange derivative instruments are freestanding and, accordingly, changes in their fair market value are recorded in earnings. The total notional amount of our forward foreign exchange contracts and options was approximately $32 million and $60 million at June 30, 2018 and December 31, 2017, respectively. We had approximately $0 million recorded as liabilities on our consolidated balance sheets as of June 30, 2018 and December 31, 2017. With the exception of long-term debt, the fair values of our financial instruments, including cash and cash equivalents, accounts receivable, trade accounts payable and accrued liabilities approximate carrying value. The carrying value of our debt was $708 million and $526 million at June 30, 2018 and December 31, 2017, respectively. We estimate the fair value of the Term Loan using Level 2 inputs, or quoted market prices. The fair value of our debt was $712 million and $533 million at June 30, 2018 and December 31, 2017 respectively.

- Definition

The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information.

+ References + Details

Commitments and Contingencies	6 Months Ended
Commitments and Contingencies	Jun. 30, 2018
Commitments and Contingencies [Abstract]
Commitments and Contingencies	NOTE 10 – COMMITMENTS AND CONTINGENCIES Litigation Asbestos Claims. We are one of many defendants in lawsuits that plaintiffs have brought seeking damages for personal injuries that exposure to asbestos allegedly caused. Plaintiffs and their family members have brought these lawsuits against a large volume of defendant entities as a result of the defendants’ manufacture, distribution, supply or other involvement with asbestos, asbestos containing-products or equipment or activities that allegedly caused plaintiffs to be exposed to asbestos. These plaintiffs typically assert exposure to asbestos as a consequence of third-party manufactured products that our MRC Global (US) Inc. subsidiary purportedly distributed. As of June 30, 2018, we are named a defendant in approximately 552 lawsuits involving approximately 1,152 claims. No asbestos lawsuit has resulted in a judgment against us to date, with a majority being settled, dismissed or otherwise resolved. Applicable third-party insurance has substantially covered these claims, and insurance should continue to cover a substantial majority of existing and anticipated future claims. Accordingly, we have recorded a liability for our estimate of the most likely settlement of asserted claims and a related receivable from insurers for our estimated recovery, to the extent we believe that the amounts of recovery are probable. It is not possible to predict the outcome of these claims and proceedings. However, in our opinion, the likelihood that the ultimate disposition of any of these claims and legal proceedings will have a material adverse effect on our consolidated financial statements is remote. Other Legal Claims and Proceedings. From time to time, we have been subject to various claims and involved in legal proceedings incidental to the nature of our businesses. We maintain insurance coverage to reduce financial risk associated with certain of these claims and proceedings. It is not possible to predict the outcome of these claims and proceedings. However, in our opinion, the likelihood that the ultimate disposition of any of these claims and legal proceedings will have a material adverse effect on our consolidated financial statements is remote. Product Claims. From time to time, in the ordinary course of our business, our customers may claim that the products that we distribute are either defective or require repair or replacement under warranties that either we or the manufacturer may provide to the customer. These proceedings are, in the opinion of management, ordinary and routine matters incidental to our normal business. Our purchase orders with our suppliers generally require the manufacturer to indemnify us against any product liability claims, leaving the manufacturer ultimately responsible for these claims. In many cases, state, provincial or foreign law provides protection to distributors for these sorts of claims, shifting the responsibility to the manufacturer. In some cases, we could be required to repair or replace the products for the benefit of our customer and seek our recovery from the manufacturer for our expense. In our opinion, the likelihood that the ultimate disposition of any of these claims and legal proceedings will have a material adverse effect on our consolidated financial statements is remote. Customer Contracts We have contracts and agreements with many of our customers that dictate certain terms of our sales arrangements (pricing, deliverables, etc.). While we make every effort to abide by the terms of these contracts, certain provisions are complex and often subject to varying interpretations. Under the terms of these contracts, our customers have the right to audit our adherence to the contract terms. Historically, any settlements that have resulted from these customer audits have not been material to our consolidated financial statements. Purchase Commitments We have purchase obligations consisting primarily of inventory purchases made in the normal course of business to meet operating needs. While our vendors often allow us to cancel these purchase orders without penalty, in certain cases, cancellations may subject us to cancellation fees or penalties depending on the terms of the contract.

Background and Basis of Presentation (Policy)	6 Months Ended
Background and Basis of Presentation (Policy)	Jun. 30, 2018
Background and Basis of Presentation [Abstract]
Business Operations	Business Operations: MRC Global Inc. is a holding company headquartered in Houston, Texas. Our wholly owned subsidiaries are global distributors of pipe, valves, fittings (“PVF”) and related products and services across each of the upstream (exploration, production and extraction of underground oil and gas), midstream (gathering and transmission of oil and gas, gas utilities, and the storage and distribution of oil and gas) and downstream (crude oil refining and petrochemical and chemical processing and general industrials) sectors. We have branches in principal industrial, hydrocarbon producing and refining areas throughout the United States, Canada, Europe, Asia, Australasia, the Middle East and Caspian. Our products are obtained from a broad range of suppliers.
Basis of Presentation	Basis of Presentation: We have prepared our unaudited condensed consolidated financial statements in accordance with Rule 10-01 of Regulation S-X for interim financial statements. These statements do not include all information and footnotes that generally accepted accounting principles require for complete annual financial statements. However, the information in these statements reflects all normal recurring adjustments which are, in our opinion, necessary for a fair presentation of the results for the interim periods. The results of operations for the three and six months ended June 30, 2018 are not necessarily indicative of the results that will be realized for the fiscal year ending December 31, 2018. We have derived our condensed consolidated balance sheet as of December 31, 2017 from the audited consolidated financial statements for the year ended December 31, 2017. You should read these condensed consolidated financial statements in conjunction with the audited consolidated financial statements and notes thereto for the year ended December 31, 2017. The consolidated financial statements include the accounts of MRC Global Inc. and its wholly owned and majority owned subsidiaries (collectively referred to as the “Company” or by such terms as “we,” “our” or “us”). All material intercompany balances and transactions have been eliminated in consolidation.
Recent Accounting Pronouncements	Recent Accounting Pronouncements: In February 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2016-02, Leases, which will replace the existing guidance in ASC 870, Leases. This ASU requires a dual approach for lessee accounting under which a lessee would account for leases as finance leases or operating leases. Both finance leases and operating leases will result in the lessee recognizing a right-of-use asset and a corresponding lease liability. For finance leases, the lessee would recognize interest expense and amortization of the right-of-use asset, and for operating leases, the lessee would recognize a straight-line total lease expense. This guidance is effective for annual and interim reporting periods of public entities beginning after December 15, 2018. Therefore, we will adopt the standard in the first quarter of 2019. We are in the process of evaluating the effect of the adoption of ASU 2016-02 on our consolidated financial statements. We believe the recognition of right-of-use assets and lease liabilities will result in material increases in assets and liabilities reflected on our consolidated balance sheets. We do not expect the adoption of ASU 2016-02 to have a material impact on our consolidated statements of operations and cash flows. Adoption of New Accounting Standards: ASU 2014-09, Revenue - Revenue from Contracts with Customers. On January 1, 2018, we adopted ASU 2014-09 and all the related amendments, (collectively, “ASC 606”) using the modified retrospective method. Under this method, a cumulative effect of initially applying the new revenue standard requires an adjustment to the opening balance of retained earnings, and the comparative information continues to be reported under the accounting standards in effect for those periods prior to adoption. The cumulative effect of initially applying the new standard was not material to our consolidated financial statements. We do not expect the adoption of this guidance to have a material effect on our results of operations in future periods. ASU 2017-12, Accounting for Derivatives and Hedging Transactions (Topic 815) Targeted Improvements to Accounting for Hedging Activities. In March 2018, we early adopted ASU 2017-12. The new standard amends the hedge accounting model to better portray an organization’s risk management activities in the financial statements, as well as simplifies the applications of certain hedge accounting guidance. The implementation of ASU 2017-12 did not have a material impact on our consolidated financial statements.

Revenue Recognition (Tables)

6 Months Ended

Jun. 30, 2018

Revenue Recognition [Abstract]

Summary of Revenue Disaggregation


Three Months Ended
June 30,

	U.S.		Canada		International		Total
2018:
Upstream	$	189	$	64	$	54	$	307
Midstream		454		8		10		472
Downstream		235		8		60		303
	$	878	$	80	$	124	$	1,082
2017:
Upstream	$	159	$	50	$	49	$	258
Midstream		379		14		27		420
Downstream		182		5		57		244
	$	720	$	69	$	133	$	922


Six Months Ended
June 30,

	U.S.		Canada		International		Total
2018:
Upstream	$	367	$	121	$	121	$	609
Midstream		847		22		13		882
Downstream		470		15		116		601
	$	1,684	$	158	$	250	$	2,092
2017:
Upstream	$	299	$	111	$	93	$	503
Midstream		725		25		41		791
Downstream		362		10		118		490
	$	1,386	$	146	$	252	$	1,784

Inventories (Tables)

6 Months Ended

Jun. 30, 2018

Inventories [Abstract]

Composition of Inventory


	June 30,		December 31,
	2018		2017
Finished goods inventory at average cost:
Valves, automation, measurement and instrumentation	$	331	$	292
Carbon steel pipe, fittings and flanges		355		268
All other products		337		270
		1,023		830
Less: Excess of average cost over LIFO cost (LIFO reserve)		(117)		(95)
Less: Other inventory reserves		(34)		(34)
	$	872	$	701

Long-Term Debt (Tables)

6 Months Ended

Jun. 30, 2018

Long-Term Debt [Abstract]

Components of Long-Term Debt


	June 30,		December 31,
	2018		2017
Senior Secured Term Loan B, net of discount and issuance costs of $3	$	395	$	397
Global ABL Facility		313		129
		708		526
Less: current portion		4		4
	$	704	$	522

Interest on Borrowings


	June 30,		December 31,
	2018		2017
Senior Secured Term Loan B		5.60%		5.18%
Global ABL Facility		3.77%		3.19%
Weighted average interest rate		4.79%		4.69%

- Definition

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21475-112644

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(e),(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21538-112644

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21506-112644

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28541-108399

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21521-112644

+ Details

Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2018

Stockholders' Equity [Abstract]

Summary of Share Repurchase Activity


Summary of share repurchase activity under the repurchase program:

	Three Months Ended				Six Months Ended
	June 30,		June 30,		June 30,		June 30,
	2018		2017		2018		2017
Number of shares acquired on the open market		1,144,379		-		2,871,204		859,830
Average price per share	$	17.39	$	-	$	17.39	$	20.54
Total cost of acquired shares (in millions)	$	20	$	-	$	50	$	18

Accumulated Other Comprehensive Loss in Accompanying Consolidated Balance Sheets



	June 30,		December 31,
	2018		2017
Currency translation adjustments	$	(219)	$	(209)
Pension related adjustments		(1)		(1)
Accumulated other comprehensive loss	$	(220)	$	(210)

Earnings Per Share



	Three Months Ended				Six Months Ended
	June 30,		June 30,		June 30,		June 30,
	2018		2017		2018		2017
Net income	$	22	$	6	$	40	$	12
Less: Dividends on Series A Preferred Stock		6		6		12		12
Net income attributable to common stockholders	$	16	$	-	$	28	$	-

Weighted average basic shares outstanding		90.1		94.5		90.7		94.6
Effect of dilutive securities		1.5		1.1		2.0		1.4
Weighted average diluted shares outstanding		91.6		95.6		92.7		96.0

Net income per share:
Basic	$	0.18	$	-	$	0.31	$	-
Diluted	$	0.17	$	-	$	0.30	$	-

Segment Information (Tables)

6 Months Ended

Jun. 30, 2018

Segment Information [Abstract]

Schedule of Financial Information for Each Segment


	Three Months Ended				Six Months Ended
	June 30,		June 30,		June 30,		June 30,
	2018		2017		2018		2017
Sales
U.S.	$	878	$	720	$	1,684	$	1,386
Canada		80		69		158		146
International		124		133		250		252
Consolidated sales	$	1,082	$	922	$	2,092	$	1,784

Operating income
U.S.	$	37	$	21	$	65	$	32
Canada		2		1		4		4
International		2		(5)		3		(5)
Total operating income		41		17		72		31

Interest expense		(10)		(8)		(18)		(15)
Other, net		(1)		-		1		-
Income before income taxes	$	30	$	9	$	55	$	16


					June 30,		December 31,
					2018		2017
Total assets
U.S.					$	2,244	$	1,970
Canada						152		162
International						220		208
Total assets					$	2,616	$	2,340

Schedule of Net Sales by Product Line


	Three Months Ended				Six Months Ended
	June 30,		June 30,		June 30,		June 30,
Type	2018		2017 (1)		2018		2017 (1)
Line pipe	$	212	$	170	$	370	$	316
Carbon steel fittings and flanges		178		139		349		262
Total carbon steel pipe, fittings and flanges		390		309		719		578
Valves, automation, measurement and instrumentation		375		327		753		649
Gas products		147		125		271		241
Stainless steel and alloy pipe and fittings		49		50		102		91
General oilfield products		121		111		247		225
	$	1,082	$	922	$	2,092	$	1,784

(1)

Revenue Recognition (Narrative) (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Revenue Recognition [Abstract]
Contract assets	$ 36	$ 31
Deferred revenue	31	$ 30
Deferred revenue recognized	$ 1

Revenue Recognition (Summary of Revenue Disaggregation) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Disaggregation of Revenue [Line Items]
Revenue	$ 1,082	$ 922	$ 2,092	$ 1,784
U.S. [Member]
Disaggregation of Revenue [Line Items]
Revenue	878	720	1,684	1,386
Canada [Member]
Disaggregation of Revenue [Line Items]
Revenue	80	69	158	146
International [Member]
Disaggregation of Revenue [Line Items]
Revenue	124	133	250	252
Upstream [Member]
Disaggregation of Revenue [Line Items]
Revenue	307	258	609	503
Upstream [Member] \| U.S. [Member]
Disaggregation of Revenue [Line Items]
Revenue	189	159	367	299
Upstream [Member] \| Canada [Member]
Disaggregation of Revenue [Line Items]
Revenue	64	50	121	111
Upstream [Member] \| International [Member]
Disaggregation of Revenue [Line Items]
Revenue	54	49	121	93
Midstream [Member]
Disaggregation of Revenue [Line Items]
Revenue	472	420	882	791
Midstream [Member] \| U.S. [Member]
Disaggregation of Revenue [Line Items]
Revenue	454	379	847	725
Midstream [Member] \| Canada [Member]
Disaggregation of Revenue [Line Items]
Revenue	8	14	22	25
Midstream [Member] \| International [Member]
Disaggregation of Revenue [Line Items]
Revenue	10	27	13	41
Downstream [Member]
Disaggregation of Revenue [Line Items]
Revenue	303	244	601	490
Downstream [Member] \| U.S. [Member]
Disaggregation of Revenue [Line Items]
Revenue	235	182	470	362
Downstream [Member] \| Canada [Member]
Disaggregation of Revenue [Line Items]
Revenue	8	5	15	10
Downstream [Member] \| International [Member]
Disaggregation of Revenue [Line Items]
Revenue	$ 60	$ 57	$ 116	$ 118

Inventories (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Finished goods inventory at average cost:
Finished goods inventory at average cost	$ 1,023	$ 830
Less: Excess of average cost over LIFO cost (LIFO reserve)	(117)	(95)
Less: Other inventory reserves	(34)	(34)
Inventories, net	872	701
Valves, Automation, Measurement And Instrumentation [Member]
Finished goods inventory at average cost:
Finished goods inventory at average cost	331	292
Carbon Steel Pipe, Fittings And Flanges [Member]
Finished goods inventory at average cost:
Finished goods inventory at average cost	355	268
All Other Products [Member]
Finished goods inventory at average cost:
Finished goods inventory at average cost	$ 337	$ 270

Long-Term Debt (Narrative) (Details) - USD ($)		6 Months Ended
Long-Term Debt (Narrative) (Details) - USD ($)	May 22, 2018	Jun. 30, 2018	Jun. 30, 2017	Mar. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Proceeds from revolving credit facilities		$ 659,000,000	$ 223,000,000
Weighted average interest rate		4.79%		5.15%	4.69%
Global ABL Facility [Member]
Debt Instrument [Line Items]
Maturity date		Sep. 30, 2022
Credit facility, maximum borrowing capacity		$ 800,000,000
Proceeds from revolving credit facilities		200,000,000
Credit facility, remaining borrowing capacity		$ 414,000,000
Weighted average interest rate		3.77%			3.19%
Global ABL Facility [Member] \| U.S. [Member]
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity		$ 675,000,000
Global ABL Facility [Member] \| Canada [Member]
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity		65,000,000
Global ABL Facility [Member] \| United Kingdom [Member]
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity		7,000,000
Global ABL Facility [Member] \| Australia [Member]
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity		15,000,000
Global ABL Facility [Member] \| Belgium [Member]
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity		7,000,000
Global ABL Facility [Member] \| Norway [Member]
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity		18,000,000
Global ABL Facility [Member] \| Netherlands [Member]
Debt Instrument [Line Items]
Credit facility, maximum borrowing capacity		$ 13,000,000
Secured Term Loan [Member] \| Senior Secured Term Loan B [Member]
Debt Instrument [Line Items]
Debt maturity period		7 years
Principal amount		$ 400,000,000
Term loan annual amortization percentage		1.00%
Maturity date		Sep. 30, 2024
Term Loan accordion feature		$ 200,000,000
Percentage of capital stock in foreign subsidiaries securing Term Loan B		65.00%
Weighted average interest rate		5.60%			5.18%
Secured Term Loan [Member] \| Senior Secured Term Loan B [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Variable interest rate	2.50%
Secured Term Loan [Member] \| Senior Secured Term Loan B [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Variable interest rate	3.50%
Secured Term Loan [Member] \| Senior Secured Term Loan B, Refinanced [Member]
Debt Instrument [Line Items]
Prepayment premium	1.00%
Secured Term Loan [Member] \| Senior Secured Term Loan B, Refinanced [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Variable interest rate	2.00%
Secured Term Loan [Member] \| Senior Secured Term Loan B, Refinanced [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Variable interest rate	3.00%
Secured Term Loan [Member] \| Senior Secured Leverage Ratio Is No More Than 2.75 to 1.00 [Member] \| Senior Secured Term Loan B [Member]
Debt Instrument [Line Items]
Senior secured leverage ratio		2.75
Repayment of Term Loan, percentage		25.00%
Secured Term Loan [Member] \| Senior Secured Leverage Ratio Is No More Than 2.50 to 1.00 [Member] \| Senior Secured Term Loan B [Member]
Debt Instrument [Line Items]
Senior secured leverage ratio		2.50
Repayment of Term Loan, percentage		0.00%
Secured Term Loan [Member] \| Minimum [Member] \| Senior Secured Term Loan B [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Variable interest rate	2.00%
Secured Term Loan [Member] \| Minimum [Member] \| Senior Secured Term Loan B [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Variable interest rate	1.00%
Secured Term Loan [Member] \| Minimum [Member] \| Senior Secured Term Loan B, Refinanced [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Variable interest rate	1.00%
Secured Term Loan [Member] \| Minimum [Member] \| Senior Secured Term Loan B, Refinanced [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Variable interest rate	0.00%
Secured Term Loan [Member] \| Maximum [Member] \| Senior Secured Term Loan B [Member]
Debt Instrument [Line Items]
Senior secured leverage ratio		4.00
Repayment of Term Loan, percentage		50.00%

Long-Term Debt (Components of Long-Term Debt) (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Long-term debt	$ 708	$ 526
Less: current portion	4	4
Long-term debt, net	704	522
Secured Term Loan [Member]
Debt Instrument [Line Items]
Long-term debt	395	397
Original issue discount and issuance costs on senior secured Term Loan B	3
Global ABL Facility [Member]
Debt Instrument [Line Items]
Long-term debt	$ 313	$ 129

Long-Term Debt (Interest on Borrowings) (Details)	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Weighted average interest rate	4.79%	5.15%	4.69%
Global ABL Facility [Member]
Debt Instrument [Line Items]
Weighted average interest rate	3.77%		3.19%
Senior Secured Term Loan B [Member] \| Secured Term Loan [Member]
Debt Instrument [Line Items]
Weighted average interest rate	5.60%		5.18%

Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
Income Taxes (Details) - USD ($) $ in Millions	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Income Taxes [Abstract]
Tax benefit					$ 2
Effective tax rate	27.00%	33.00%	27.00%	25.00%
Federal statutory rate			21.00%	35.00%
Benefit on deferred tax assets					57
Expense on undistributed foreign earnings					$ 7

Redeemable Preferred Stock (Details) $ / shares in Units, $ in Millions	1 Months Ended
	Jun. 30, 2015 USD ($) $ / shares shares
Stockholders' Equity [Abstract]
Preferred stock, issued \| shares	363,000
Gross proceeds from issuance of Series A Preferred Stock \| $	$ 355
Preferred stock, stated value \| $ / shares	$ 1,000
Preferred stock, dividend rate	6.50%
Percent of par value	105.00%
Preferred stock, initial conversion rate \| shares	55.9284
Preferred stock, initial conversion price \| $ / shares	$ 17.88
Preferred stock, common stock as percentage of conversion price	150.00%

Stockholders' Equity (Narrative) (Details) - USD ($)	1 Months Ended	3 Months Ended		6 Months Ended		90 Months Ended
Stockholders' Equity (Narrative) (Details) - USD ($)	Apr. 30, 2015	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Oct. 31, 2017	Nov. 30, 2016	Nov. 30, 2015
Stockholders Equity [Line Items]
Share repurchase program, total shares acquired				14,622,930
Share repurchase program, average cost per share				$ 15.38
Share repurchase program, cost of total shares acquired				$ 225,000,000
Common stock, shares outstanding		90,300,790		90,300,790		90,300,790
2015 Share Repurchase Program [Member]
Stockholders Equity [Line Items]
Share repurchase program, authorized amount								$ 125,000,000	$ 100,000,000
2017 Share Repurchase Program [Member]
Stockholders Equity [Line Items]
Share repurchase program, authorized amount							$ 100,000,000
2011 Omnibus Incentive Plan [Member]
Stockholders Equity [Line Items]
Shares reserved for Incentive Plan		3,250,000		3,250,000		3,250,000
Additional shares reserved for Incentive Plan	4,250,000
Stock granted						6,680,204
Director [Member] \| 2011 Omnibus Incentive Plan [Member]
Stockholders Equity [Line Items]
Vesting period				1 year
Minimum [Member] \| 2011 Omnibus Incentive Plan [Member]
Stockholders Equity [Line Items]
Vesting period				3 years
Maximum [Member] \| 2011 Omnibus Incentive Plan [Member]
Stockholders Equity [Line Items]
Vesting period				5 years
Stock Options [Member]
Stockholders Equity [Line Items]
Anti-dilutive securities		3,200,000	2,100,000	3,500,000	2,100,000
Stock Options [Member] \| 2011 Omnibus Incentive Plan [Member]
Stockholders Equity [Line Items]
Maximum term for stock option plan grant				10 years
Restricted Stock [Member] \| 2011 Omnibus Incentive Plan [Member]
Stockholders Equity [Line Items]
Stock granted				81,542
Performance Shares [Member] \| 2011 Omnibus Incentive Plan [Member]
Stockholders Equity [Line Items]
Stock granted				222,435
Restricted Stock Units (RSUs) [Member] \| 2011 Omnibus Incentive Plan [Member]
Stockholders Equity [Line Items]
Stock granted				505,297
Restricted Stock, Restricted Unites And Performance Stock Units [Member]
Stockholders Equity [Line Items]
Anti-dilutive securities		0		0

Stockholders' Equity (Summary of Share Repurchase Activity) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Stockholders' Equity [Abstract]
Number of shares acquired on the open market	1,144,379		2,871,204	859,830
Average price per share	$ 17.39		$ 17.39	$ 20.54
Total cost of acquired shares	$ 20		$ 50	$ 18

Stockholders' Equity (Accumulated Other Comprehensive Loss in Accompanying Consolidated Balance Sheets) (Details) - USD ($) $ in Millions	Jun. 30, 2018	Dec. 31, 2017
Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ (219)	$ (209)
Pension Related Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	(1)	(1)
Accumulated Other Comprehensive Loss [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ (220)	$ (210)

Stockholders' Equity (Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Stockholders' Equity [Abstract]
Net income	$ 22	$ 6	$ 40	$ 12
Less: Dividends on Series A Preferred Stock	6	$ 6	12	$ 12
Net income attributable to common stockholders	$ 16		$ 28
Weighted average basic shares outstanding	90.1	94.5	90.7	94.6
Effect of dilutive securities	1.5	1.1	2.0	1.4
Weighted average diluted shares outstanding	91.6	95.6	92.7	96.0
Net income per share:
Basic	$ 0.18		$ 0.31
Diluted	$ 0.17		$ 0.30

Segment Information (Narrative) (Details)	6 Months Ended
Segment Information (Narrative) (Details)	Jun. 30, 2018 segment
Segment Information [Line Items]
Number of operating segments	4
U.S. [Member]
Segment Information [Line Items]
Number of operating segments	2

Segment Information (Schedule of Financial Information for Each Segment) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Sales
Net Sales	$ 1,082	$ 922	$ 2,092	$ 1,784
Operating income
Total operating income	41	17	72	31
Interest expense	(10)	(8)	(18)	(15)
Other, net	(1)		1
Income before income taxes	30	9	55	16
Total assets
Total assets	2,616		2,616		$ 2,340
U.S. [Member]
Sales
Net Sales	878	720	1,684	1,386
Operating income
Total operating income	37	21	65	32
Total assets
Total assets	2,244		2,244		1,970
Canada [Member]
Sales
Net Sales	80	69	158	146
Operating income
Total operating income	2	1	4	4
Total assets
Total assets	152		152		162
International [Member]
Sales
Net Sales	124	133	250	252
Operating income
Total operating income	2	$ (5)	3	$ (5)
Total assets
Total assets	$ 220		$ 220		$ 208

Segment Information (Schedule of Net Sales by Product Line) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales	$ 1,082	$ 922	$ 2,092	$ 1,784
Line pipe [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales	212	170	370	316
Carbon Steel Fittings And Flanges [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales	178	139	349	262
Carbon Steel Pipe, Fittings And Flanges [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales	390	309	719	578
Valves, Automation, Measurement And Instrumentation [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales	375	327	753	649
Gas Products [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales	147	125	271	241
Stainless Steel And Alloy Pipe And Fittings [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales	49	50	102	91
General Oilfield Products [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales	$ 121	$ 111	$ 247	225
Other [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales				$ 36

Fair Value Measurements (Details) - USD ($)	3 Months Ended
Fair Value Measurements (Details) - USD ($)	Mar. 31, 2018	Jun. 30, 2018	Dec. 31, 2017
Long-term Debt [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Carrying value of debt		$ 708,000,000	$ 526,000,000
Long-term Debt [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of our debt		712,000,000	533,000,000
Foreign exchange forward contracts [Member] \| Level 2 [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notional amount		32,000,000	60,000,000
Fair value of forward foreign exchange contracts and options		0	$ 0
Interest Rate Swap [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Term of swap	5 years
Notional amount	$ 250,000,000
Fixed interest rate	2.7145%
Fair value of swap	$ 0
Swap liability		$ 0

Commitments and Contingencies (Details)	Jun. 30, 2018 claim lawsuit
Commitments and Contingencies [Abstract]
Number of lawsuits \| lawsuit	552
Asbestos related pending claims \| claim	1,152