Usg (USG) 10-Q 27 Apr 17 2017 Q1 Quarterly report Financial data

Document and Entity Information

Document and Entity Information	3 Months Ended
	Mar. 31, 2017shares
Document and Entity Information [Abstract]
Entity Registrant Name	USG CORP
Entity Central Index Key	757,011
Document Type	10-Q
Document Period End Date	Mar. 31, 2017
Amendment Flag	false
Document Fiscal Year Focus	2,017
Document Fiscal Period Focus	Q1
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding	145,792,158

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Income Statement [Abstract]
Net sales	$ 767	$ 747
Cost of products sold	603	566
Gross profit	164	181
Selling and administrative expenses	73	68
Recovery of receivable	0	(3)
Operating profit	91	116
Income from equity method investments	13	7
Interest expense	(20)	(40)
Interest income	1	2
Loss on extinguishment of debt	0	(2)
Other (expense) income, net	(1)	3
Income from continuing operations before income taxes	84	86
Income tax expense	(29)	(26)
Income from continuing operations	55	60
Income from discontinued operations, net of tax	0	7
Net income	$ 55	$ 67
Earnings per average common share - basic:
Income from continuing operations (in dollars per share)	$ 0.38	$ 0.41
Income from discontinued operations (in dollars per share)	0	0.05
Net income (in dollars per share)	0.38	0.46
Earnings per average common share - diluted:
Income from continuing operations (in dollars per share)	0.37	0.41
Income from discontinued operations (in dollars per share)	0	0.05
Net income (in dollars per share)	$ 0.37	$ 0.46
Average number of shares outstanding reconciliation
Average common shares	146,309,994	145,819,026
Dilutive awards under long-term incentive plan	2,420,360	1,167,366
Average diluted common shares	148,730,354	146,986,392

Condensed Consolidated Stateme3

Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 55	$ 67
Derivatives qualifying as cash flow hedges:
Loss on derivatives qualifying as cash flow hedges, net of tax benefit of $3 and $3, respectively	(6)	(8)
Less: Reclassification adjustment for loss on derivatives included in net income, net of tax benefit of $0 and $1, respectively	0	(2)
Net derivatives qualifying as cash flow hedges	(6)	(6)
Pension and postretirement benefits:
Changes in pension and postretirement benefits, net of tax benefit of $0 and $1, respectively	(1)	(3)
Less: Amortization of prior service cost included in net periodic pension cost, net of tax benefit of $0 in both periods	0	0
Net pension and postretirement benefits	(1)	(3)
Foreign currency translation:
Changes in foreign currency translation, net of tax benefit of $0 in both periods	40	24
Other comprehensive income (loss), net of tax	33	15
Comprehensive income	$ 88	$ 82

Condensed Consolidated Stateme4

Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) (Parentheticals) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Derivatives Qualifying as Hedges, Tax:
Loss on derivatives qualifying as cash flow hedges, tax expense (benefit)	$ (3)	$ (3)
Less: Reclassification adjustment for loss on derivatives included in net income, tax expense (benefit)	0	(1)
Pension and Other Postretirement Benefit Plans, Tax:
Changes in pension and postretirement benefits, tax expense (benefit)	0	(1)
Less: Amortization of prior service benefit (cost) included in net periodic pension cost, tax expense (benefit)	0	0
Foreign Currency Translation Adjustment, Tax:
Changes in foreign currency translation, tax expense (benefit)	$ 0	$ 0

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Assets
Cash and cash equivalents	$ 341	$ 427
Short-term marketable securities	69	62
Receivables (net of reserves 2017 - $8 and 2016 - $8)	264	183
Inventories	243	236
Income taxes receivable	1	1
Other current assets	35	40
Total current assets	953	949
Long-term marketable securities	24	29
Property, plant and equipment (net of accumulated depreciation and depletion - 2017 - $1,995 and 2016 - $1,960)	1,715	1,707
Deferred income taxes	493	492
Equity method investments	665	628
Other assets	62	64
Total assets	3,912	3,869
Liabilities and Stockholders’ Equity
Accounts payable	233	237
Accrued expenses	126	175
Current portion of long-term debt	500	0
Income taxes payable	10	10
Total current liabilities	869	422
Long-term debt	584	1,083
Deferred income taxes	4	4
Pension and other postretirement benefits	292	290
Other liabilities	187	184
Total liabilities	1,936	1,983
Preferred stock – $1 par value, authorized 36,000,000 shares; outstanding - none	0	0
Common stock – $0.10 par value; authorized 200,000,000 shares; issued: 2017 - 146,513,000 shares and 2016 - 146,167,000 shares	15	15
Treasury stock at cost – 2017- 721,000 shares and 2016 - 0 shares	(24)	0
Additional paid-in capital	3,039	3,038
Accumulated other comprehensive loss	(352)	(385)
Retained earnings (accumulated deficit)	(702)	(782)
Total stockholders’ equity	1,976	1,886
Total liabilities and stockholders’ equity	$ 3,912	$ 3,869

Condensed Consolidated Balance6

Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Statement of Financial Position [Abstract]
Reserves on receivables	$ 8	$ 8
Accumulated depreciation	$ 1,995	$ 1,960
Preferred stock - par value	$ 1	$ 1
Preferred stock - authorized shares	36,000,000	36,000,000
Preferred stock - outstanding shares	0	0
Common stock - par value	$ 0.1	$ 0.1
Common stock - authorized shares	200,000,000	200,000,000
Common stock - issued shares	146,513,000	146,167,000
Treasury Stock, Shares	721,000	0

Condensed Consolidated Stateme7

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Operating Activities
Net income	$ 55	$ 67
Income from discontinued operations, net of tax	0	7
Income from continuing operations	55	60
Adjustments to reconcile net income from continuing operations to net cash:
Depreciation, depletion and amortization	33	34
Loss on extinguishment of debt	0	2
Recovery of receivable	0	(3)
Share-based compensation expense	4	4
Deferred income taxes	29	25
Income from equity method investments	(13)	(7)
Pension settlement	0	2
Change in operating assets and liabilities	(138)	(158)
Other, net	1	(5)
Net cash provided by operating activities of continuing operations	(29)	(46)
Cash provided by operating activities of discontinued operations	(1)	16
Net cash used for operating activities of continuing operations	(30)	(30)
Investing Activities
Purchases of marketable securities	(24)	(79)
Sales or maturities of marketable securities	22	84
Capital expenditures	(39)	(14)
Return of restricted cash	0	9
Net cash provided by investing activities of continuing operations	(41)	0
Cash used in investing activities, discontinued operations	6	(1)
Net cash used for investing activities of continuing operations	(35)	(1)
Financing Activities
Repayment of debt	0	(64)
Issuance of common stock	3	0
Repurchase of common stock	(25)	0
Repurchases of common stock to satisfy employee tax withholding obligations	(3)	(1)
Net cash used in financing activities of continuing operations	(25)	(65)
Effect of exchange rate changes on cash from continuing operations	4	1
Net decrease in cash and cash equivalents from continuing operations	(91)	(110)
Net increase in cash and cash equivalents from discontinued operations	5	15
Net decrease in cash and cash equivalents from continuing operations	(86)	(95)
Cash and cash equivalents at beginning of period	427	442
Cash and cash equivalents at end of period	341	347
Supplemental Cash Flow Disclosures:
Interest paid, net of capitalized interest	35	47
Income taxes paid, net of refunds received	2	3
Noncash Investing and Financing Activities:
Amount in accounts payable for capital expenditures	$ 9	$ 3

Organization, Consolidation and

Organization, Consolidation and Presentation of Financial Statements	3 Months Ended
	Mar. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Organization, Consolidation and Presentation of Financial Statements	Organization, Consolidation and Presentation of Financial Statements PREPARATION OF FINANCIAL STATEMENTS We prepared the accompanying unaudited condensed consolidated financial statements of USG Corporation in accordance with applicable United States Securities and Exchange Commission, or SEC, guidelines pertaining to interim financial information. The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses. Actual results could differ materially from those estimates. In the opinion of our management, the financial statements reflect all adjustments, which are of a normal recurring nature, necessary for a fair presentation of our financial results for the interim periods. The results of operations for the three months ended March 31, 2017 are not necessarily indicative of the results of operations to be expected for the entire year. Certain reclassifications have been made to prior year amounts in order to conform with current year presentation. On our condensed consolidated statements of cash flows, we condensed the increase/decrease in working capital, other assets, pension and postretirement benefits, and other liabilities into "Change in operating assets and liabilities". In conjunction with the sale of L&W Supply Corporation, or L&W, which was completed on October 31, 2016 to American Builders & Contractors Supply Co., Inc., or ABC Supply, L&W is presented as discontinued operations. The results of L&W, which consisted of our Distribution segment, have been excluded from segment results. The 2016 results of our Gypsum and Ceilings segment have been revised to reflect only the sales of USG products from Gypsum and Ceilings to L&W that were sold by L&W to third party customers prior to March 31, 2016. All sales to L&W subsequent to the close of the transaction are included in net sales on our condensed consolidated statements of income. See Note 2 for further discussion. Our segments are structured around our key products and business units: Gypsum, Ceilings and USG Boral Building Products, or UBBP. Our Gypsum reportable segment is an aggregation of the operating segments of the gypsum businesses in the United States, Canada, Mexico, and Latin America, our mining operation in Canada, which we indefinitely idled in the third quarter of 2016 and our shipping company, which we exited in 2015. Gypsum manufactures products throughout the United States, Canada and Mexico. These products include USG Sheetrock ® brand gypsum wallboard, Sheetrock ® brand joint compound, Durock ® brand cement board, Levelrock ® brand gypsum underlayment, Fiberock ® brand backerboard, Securock ® brand glass mat sheathing used for building exteriors, Securock ® brand gypsum fiber and glass mat panels used as roof cover board and USG Structural Panels. Our Ceilings reportable segment is an aggregation of the operating segments of the ceilings businesses in the United States, Canada, Mexico, and Latin America. Ceilings manufactures ceiling tile in the United States and ceiling grid in the United States and Canada. UBBP is our 50/50 joint ventures with Boral Limited. UBBP manufactures, distributes and sells certain building products, mines raw gypsum and sells natural and synthetic gypsum throughout Asia, Australasia and the Middle East. These condensed consolidated financial statements and notes are to be read in conjunction with the financial statements and notes included in USG’s Annual Report on Form 10-K for the fiscal year ended December 31, 2016 , which we filed with the SEC on February 8, 2017 . RECENTLY ADOPTED ACCOUNTING PRONOUNCEMENTS We adopted Accounting Standards Update, or ASU, 2016-09, “Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting,” on January 1, 2017. This ASU simplifies certain aspects of accounting for employee share-based payments. Upon adoption, we recorded to retained earnings a $25 million cumulative-effect adjustment for previously unrecognized excess tax benefits and an immaterial cumulative-effect adjustment for the reversal of cumulative forfeiture estimates to record forfeitures as they occur. RECENTLY ISSUED ACCOUNTING PRONOUNCEMENTS In March 2017, the Financial Accounting Standards Board, or FASB, issued ASU, 2017-07, “Compensation - Retirement Benefits (Topic 715): Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost,” which will require entities to disaggregate the current service cost component from the other components of net benefit cost. Current service cost will be presented with other current compensation costs for related employees in the income statement and the other components of net benefit cost will be presented below operating profit. In addition, under the new ASU, only the service cost component of net benefit cost is eligible for capitalization when applicable. We will adopt the standard on January 1, 2018 and will adopt using the retrospective method for presentation of service cost and other components in the income statement. We will prospectively adopt the requirement to limit the capitalization of benefit costs to the service cost component. Select line items from our condensed consolidated statements of income for the three months ended March 31, 2017 and the year end December 31, 2016 which reflect the changes in presentation of net benefit costs are as follows. (millions) Three months ended March 31, 2017 Year ended December 31, 2016 After Adoption As Reported After Adoption As Reported Gross profit $ 158 $ 164 $ 700 $ 705 Operating profit 84 91 396 394 Other net periodic postretirement (benefit) costs (7 ) — 2 — Net income 55 55 510 510 We do not expect the adoption of ASU 2017-07 to have a significant impact on our other financial statements. In February 2016, the FASB issued ASU 2016-02, “Leases (Topic 842),” which supersedes existing lease guidance to require lessees to recognize assets and liabilities on the balance sheet for the rights and obligations created by long-term leases and to disclose additional quantitative and qualitative information about leasing arrangements. The standard will be effective for us in the first quarter of 2019 and we will adopt the new standard using the modified retrospective approach. While we continue to evaluate the impact of the new standard, we believe the standard will require us to implement a new lease accounting system and related policies and processes. Further, we anticipate the adoption of ASU 2016-02 will have a significant impact to our condensed consolidated balance sheets, condensed consolidated statements of income and disclosures, but we are unable to quantify the financial statement impact at this time. In May 2014, the FASB issued ASU 2014-09, “Revenue from Contracts with Customers (Topic 606),” which supersedes the revenue recognition requirements in “Revenue Recognition (Topic 605),” and requires entities to recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. Subsequently, the FASB has issued various ASUs to provide further clarification around certain aspects of Topic 606. We intend to adopt the standard on January 1, 2018 retrospectively with practical expedients. We do not expect the adoption to have a significant impact to our condensed consolidated financial statements, but it will impact our disclosures.

DIscontinued Operations

DIscontinued Operations	3 Months Ended
	Mar. 31, 2017
Discontinued Operations and Disposal Groups [Abstract]
Disposal Groups, Including Discontinued Operations, Disclosure [Text Block]	Discontinued Operations The sale of L&W was completed on October 31, 2016. The summarized financial information related to L&W that has been excluded from continuing operations and reported as a discontinued operation is as follows: (millions) Three months ended March 31, 2016 Net sales $ 357 Cost of products sold 343 Gross profit 14 Selling and administrative expenses 3 Operating profit 11 Income tax expense (4 ) Income from discontinued operations $ 7 Additionally, upon the close of the sale, we entered into a supply agreement with L&W. For the three months ended March 31, 2017 , we recorded sales to L&W of $131 million . In the comparative period for 2016 , we recorded sales of $145 million , which reflect only the sales that were sold by L&W to third party customers through March 31, 2016. We recorded a cash inflow of $109 million from L&W in the three months ended March 31, 2017 related to payments on trade receivables.

Equity Method Investments

Equity Method Investments	3 Months Ended
	Mar. 31, 2017
Equity Method Investments and Joint Ventures [Abstract]
Equity Method Investments	Equity Method Investments Equity method investments as of March 31, 2017 and December 31, 2016 , were as follows: March 31, 2017 December 31, 2016 (dollars in millions) Carrying Value Ownership Percentage Carrying Value Ownership Percentage USG Boral Building Products $ 658 50% $ 621 50% Other equity method investments 7 33% - 50% 7 33% - 50% Total equity method investments $ 665 $ 628 Investment in USG Boral Building Products UBBP is our 50 / 50 joint ventures with Boral Limited, or Boral. We account for our investment in UBBP using the equity method of accounting. As of March 31, 2017 , the amount of our consolidated retained earnings which represents undistributed earnings from UBBP is $56 million . In the event certain U.S. Dollar denominated performance targets are satisfied by UBBP, we will be obligated to pay Boral a scheduled earnout payment of up to $50 million based on performance during the first five years after closing on February 27, 2014. We have not recorded a liability for this earnout payment as we have concluded that it is currently not probable that the five-year performance target will be achieved. If our conclusion on the probability of achievement was to change, we will record a liability representing the present value of the earnout payment with a corresponding increase to our investment. Our underlying net assets in our investments are denominated in a foreign currency, and translation gains or losses will impact the recorded value of our investments. Translation gains or losses recorded in other comprehensive income were as follows: Three months ended March 31, (millions) 2017 2016 Translation gain $ 24 $ 17 Summarized financial information for our equity method investments is as follows: Three months ended March 31, (millions) 2017 2016 USG Boral Building Products: Net sales $ 276 $ 229 Gross profit 86 65 Operating profit 35 23 Income from continuing operations before income taxes 38 24 Net income 26 15 Net income attributable to USG Boral Building Products 25 14 USG share of income from investment accounted for using the equity method 13 7 TRANSACTIONS WITH UBBP Our Gypsum segment sells products to UBBP. Total sales to UBBP for the three months ended March 31, 2017 and 2016 were immaterial. In 2014, in connection with the formation of UBBP, we contributed our ownership interest in a joint venture in China to UBBP, but retained our loan receivable from this joint venture. As of both March 31, 2017 and December 31, 2016 , the loan receivable, including interest, totaled $15 million and is included in "Other assets" on our accompanying condensed consolidated balance sheets.

Segments

Segments	3 Months Ended
	Mar. 31, 2017
Segment Reporting [Abstract]
Segments	Segments Our operations are organized into three reportable segments: Gypsum, Ceilings and UBBP. As discussed in Note 2 , the results of L&W for the three months ended March 31, 2016 are presented as discontinued operations. Additionally, the results of our Gypsum and Ceilings segments for the three months ended March 31, 2016 have been revised to reflect only the sales of USG products from Gypsum and Ceilings to L&W that had been sold by L&W to third party customers by March 31, 2016 . See Note 3 for segment results for UBBP. Segment results for our Gypsum and Ceilings segments were as follows: Three months ended March 31, (millions) 2017 2016 Net Sales : Gypsum $ 649 $ 628 Ceilings 120 121 Eliminations (2 ) (2 ) Total $ 767 $ 747 Operating Profit (Loss) : Gypsum $ 91 $ 109 Ceilings 23 28 Corporate (23 ) (21 ) Total $ 91 $ 116

Marketable Securities

Marketable Securities	3 Months Ended
	Mar. 31, 2017
Investments, Debt and Equity Securities [Abstract]
Marketable Securities	Marketable Securities Marketable securities are classified as available-for-sale securities and reported at fair value, with unrealized gains and losses excluded from earnings and reported in " Accumulated other comprehensive loss " on our accompanying condensed consolidated balance sheets. Our investments in marketable securities consisted of the following: As of March 31, 2017 As of December 31, 2016 (millions) Amortized Cost Fair Value Amortized Cost Fair Value Corporate debt securities $ 65 $ 65 $ 69 $ 69 U.S. government and agency debt securities 14 14 14 14 Non-U.S. government debt securities 1 1 — — Asset-backed debt securities 6 6 2 2 Certificates of deposit 7 7 6 6 Total marketable securities $ 93 $ 93 $ 91 $ 91 The realized and unrealized gains and losses for the three months ended March 31, 2017 and 2016 were immaterial. Cost basis for securities sold are determined on a first-in-first-out basis. Contractual maturities of marketable securities as of March 31, 2017 were as follows: (millions) Amortized Cost Fair Value Due in 1 year or less $ 69 $ 69 Due in 1-5 years 24 24 Total marketable securities $ 93 $ 93 Actual maturities may differ from the contractual maturities because issuers of the securities may have the right to prepay them.

Debt

Debt	3 Months Ended
	Mar. 31, 2017
Debt Disclosure [Abstract]
Debt	Debt Total debt, including the current portion of long-term debt, consisted of the following: (millions) March 31, December 31, 5.5% senior notes due 2025 $ 350 $ 350 7.75% senior notes due 2018 500 500 Industrial revenue bonds (due 2028 through 2034) 239 239 Total $ 1,089 $ 1,089 Less: Unamortized debt issuance costs 5 6 Total $ 1,084 $ 1,083 CREDIT FACILITY Our credit facility agreement requires us to maintain a minimum fixed charge coverage ratio in the event excess availability falls below a minimum threshold. Because our excess borrowing availability as of March 31, 2017 of $125 million exceeds this threshold, the requirement to maintain the minimum fixed charge coverage ratio is not applicable. As of March 31, 2017 , we were in compliance with the covenants contained in our credit facility. As of March 31, 2017 and during the quarter then-ended, there were no borrowings under the facility. Had there been any borrowings as of that date, the applicable interest rate would have been 2.15% for loans in the U.S. and 1.94% for loans in Canada. Outstanding letters of credit totaled $37 million as of March 31, 2017 . REPURCHASE OF SENIOR NOTES In the first three months of 2016, we repurchased $62 million of our 6.3% Senior Notes due in 2016 on the open market. The transaction included premiums of $2 million and accrued interest of $1 million for aggregate consideration of $65 million . As a result of the repurchases, we recorded a loss on early extinguishment of debt, before tax, of $2 million including premiums, write-off of deferred financing fees. OTHER (millions) March 31, December 31, Fair value of debt $ 1,128 $ 1,129 Accrued interest 14 31 The fair values of our debt were determined utilizing prices from independent pricing services. The vendors’ methodologies utilize various forms of market data, including but not limited to, trade data, yield, spreads, bids and offers. We review the values provided by the independent pricing service for reasonableness by comparing the valuations received from the independent pricing service to valuations from at least one other observable source. We have not adjusted the prices obtained from the independent pricing service. As a result, the fair values are classified as Level 2.

Derivative Instruments

Derivative Instruments	3 Months Ended
	Mar. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	Derivative Instruments We use derivative instruments to manage selected commodity price and foreign currency exposures as described below. We do not use derivative instruments for speculative trading purposes, and we typically do not hedge beyond five years. Cash flows from derivative instruments are included in net cash used for operating activities in the condensed consolidated statements of cash flows. Gains and losses on contracts designated as cash flow hedges are reclassified into earnings when the underlying forecasted transactions affect earnings. For contracts designated as cash flow hedges, we reassess the probability of the underlying forecasted transactions occurring on a quarterly basis. Derivative Instruments Type Hedged Item Aggregate Notional Amount Contracts Maturing Through Commodity Natural gas swaps Purchases of natural gas 33 million mmBTUs* December 31, 2021 Foreign Exchange Forward contracts Purchases of products and services denominated in a foreign currency $89 million December 31, 2018 Foreign Exchange Forward contracts Intercompany Loan $23 million May 31, 2017 * - millions of British Thermal Units COUNTERPARTY RISK, MASTER NETTING ARRANGEMENTS AND BALANCE SHEET OFFSETTING We are exposed to credit losses in the event of nonperformance by the counterparties to our derivative instruments. As of March 31, 2017 , our derivatives were in a $7 million net liability position. All of our counterparties have investment grade credit ratings; accordingly, we anticipate that they will be able to fully satisfy their obligations under the contracts. All of our derivative contracts are governed by master netting agreements negotiated between us and the counterparties that reduce our counterparty credit exposure. The agreements outline the conditions (such as credit ratings and net derivative fair values) upon which we, or the counterparties, are required to post collateral. As required by certain of our agreements, we had $6 million of collateral posted with our counterparties related to our derivatives as of March 31, 2017 . Amounts paid as cash collateral are included in "Receivables" on our accompanying condensed consolidated balance sheets. We have not adopted an accounting policy to offset fair value amounts related to derivative contracts under our master netting arrangements; therefore, individual derivative contracts are reflected on a gross basis, as either assets or liabilities, on our accompanying condensed consolidated balance sheets, based on their fair value as of the balance sheet date. FINANCIAL STATEMENT INFORMATION The following are the pretax effects of derivative instruments on the condensed consolidated statements of income for the three months ended March 31, 2017 and 2016 . Amount of Gain or (Loss) Recognized in Other Comprehensive Income on Derivatives (Effective Portion) Location of Gain or (Loss) Reclassified from AOCI into Income (Effective Portion) Amount of Gain or (Loss) Reclassified from AOCI into Income (Effective Portion) (millions) 2017 2016 2017 2016 Derivatives in Cash Flow Hedging Relationships Commodity contracts $ (9 ) $ (5 ) Cost of products sold $ — $ (5 ) Foreign exchange contracts — (6 ) Cost of products sold — 2 Total $ (9 ) $ (11 ) $ — $ (3 ) For both commodity contracts and foreign exchange contracts, no ineffectiveness was recorded in three months ended March 31, 2017 and 2016 . Location of Gain or (Loss) Recognized in Income on Derivatives Amount of Gain or (Loss) Recognized in Income on Derivatives (millions) 2017 2016 Derivatives Not Designated as Hedging Instruments Commodity contracts Cost of products sold $ (1 ) $ (1 ) Total $ (1 ) $ (1 ) The following are the fair values of derivative instruments and the location on our accompanying condensed consolidated balance sheets as of March 31, 2017 and December 31, 2016 . Balance Sheet Location Fair Value Balance Sheet Location Fair Value (millions) 3/31/17 12/31/16 3/31/17 12/31/16 Derivatives in Cash Flow Hedging Relationships Commodity contracts Other current assets $ 4 $ 8 Accrued expenses $ 4 $ 4 Commodity contracts Other assets 1 3 Other liabilities 8 5 Foreign exchange contracts Other current assets 1 1 Accrued expenses 1 1 Total derivatives in cash flow hedging relationships $ 6 $ 12 $ 13 $ 10 Derivatives Not Designated as Hedging Instruments Commodity contracts Other current assets $ — $ 1 Accrued expenses $ — $ — Total derivatives not designated as hedging instruments $ — $ 1 $ — $ — Total derivatives Total assets $ 6 $ 13 Total liabilities $ 13 $ 10 As of March 31, 2017 , we had no derivatives designated as fair value hedges or net investment hedges.

Fair Value Measurements

Fair Value Measurements	3 Months Ended
	Mar. 31, 2017
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements Certain assets and liabilities are required to be recorded at fair value. There are three levels of inputs that may be used to measure fair value. Level 1 uses quoted prices for identical assets and liabilities in active markets. Level 2 uses quoted prices for similar assets and liabilities in active markets; quoted prices for identical or similar assets and liabilities in markets that are not active; and model-derived valuations in which all significant inputs and significant value drivers are observable in active markets. Level 3 uses valuations derived from valuation techniques in which one or more significant inputs or significant value drivers are unobservable. The cash equivalents and equity mutual funds shown in the table below primarily consist of money market funds that are valued based on quoted prices in active markets and, as a result, are classified as Level 1. Marketable securities are valued using a "market value" approach and values are based on quoted prices or other observable market inputs received from data providers. Derivatives are valued using the "income" approach such as discounted-cash-flow models and readily observable market data. The inputs for the valuation models are obtained from data providers and include end-of-period spot and forward natural gas prices, foreign currency exchange rates, natural gas price volatility and LIBOR and swap rates for discounting the cash flows implied from the derivative contracts. Therefore, we have classified our marketable securities and derivatives as Level 2. Our assets and liabilities measured at fair value on a recurring basis were as follows: Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total (millions) 3/31/17 12/31/16 3/31/17 12/31/16 3/31/17 12/31/16 3/31/17 12/31/16 Cash equivalents $ 37 $ 38 $ 32 $ 34 $ — $ — $ 69 $ 72 Equity mutual funds 5 5 — — — — 5 5 Marketable securities: Corporate debt securities — — 65 69 — — 65 69 U.S. government and agency debt securities — — 14 14 — — 14 14 Non-U.S. government debt securities — — 1 — — — 1 — Asset-backed debt securities — — 6 2 — — 6 2 Certificates of deposit — — 7 6 — — 7 6 Derivative assets — — 6 13 — — 6 13 Derivative liabilities — — (13 ) (10 ) — — (13 ) (10 )

Employee Retirement Plans

Employee Retirement Plans	3 Months Ended
	Mar. 31, 2017
Compensation and Retirement Disclosure [Abstract]
Employee Retirement Plans	Employee Retirement Plans The components of net pension and postretirement benefit costs are summarized in the following table: Three months ended March 31, (millions) 2017 2016 Pension: Service cost of benefits earned $ 10 $ 11 Interest cost on projected benefit obligation 16 17 Expected return on plan assets (23 ) (22 ) Settlement — 2 Net amortization 5 5 Net pension cost (a) $ 8 $ 13 Postretirement: Service cost of benefits earned $ 1 $ 1 Interest cost on projected benefit obligation 1 1 Net amortization (6 ) (7 ) Net postretirement benefit (b) $ (4 ) $ (5 ) (a) Net pension cost, excluding settlement costs, includes expenses allocated to income from discontinued operations for L&W totaling $2 million for the three months ended March 31, 2016. (b) Net postretirement benefit includes a net benefit allocated to income from discontinued operations for L&W totaling $1 million for the three months ended March 31, 2016. During the first three months of 2017 , we made cash contributions of $2 million to our pension plan in Canada. We expect to make total contributions to our pension plans in 2017 of approximately $74 million .

Share-Based Compensation

Share-Based Compensation	3 Months Ended
	Mar. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-Based Compensation	Share-Based Compensation During the first three months of 2017 , we granted share-based compensation in the form of market share units, or MSUs, performance shares, and restricted stock units, or RSUs, to eligible participants under our 2016 Long-Term Incentive Plan. We recognize expense on all share-based grants over the service period, which is the shorter of the period until the employees’ retirement eligibility dates and the service period of the award for awards expected to vest. We record forfeitures as they occur. Awards granted during the first three months of 2017 , weighted average fair value, and assumptions used to determine fair value were as follows: MSUs Performance Shares RSUs Awards granted 371,346 112,732 49,000 Weighted average fair value (a) $ 35.79 $ 39.42 $ 31.36 Expected volatility (b) 32.10 % 32.10 % N/A Risk-free rate (c) 1.39 % 1.39 % N/A Expected term (in years) (d) 2.96 2.96 N/A Expected dividends — — N/A (a) Fair value of MSUs and Performance Shares is estimated on the date of grant using the Monte Carlo simulation that used the assumptions outlined above. Fair value of RSUs is equal to the closing price of our common stock on the date of grant. (b) The expected volatility rate was based on stock price history immediately prior to grant for a period commensurate with the expected term. (c) The risk-free rate was based on zero coupon U.S. government issues at the time of grant. (d) The expected term represents the period from the valuation date to the end of the performance period. Terms of the awards granted during the first three months of 2017 were as follows: MSUs Performance Shares RSUs Maximum shares/units earned Varies from 0% to 150% of the number of MSUs awarded depending on the actual performance of our stock price Varies from 0% to 200% of the number of performance shares awarded depending on the performance of our total stockholder return relative to the performance of the Dow Jones U.S. Construction and Materials Index (a) 100% Vesting Provisions Three-year performance period Three-year performance period Specified number of years from the grant date Vesting in the case of termination of employment due to death, disability, retirement or change in control during performance period (b) Pro-rated based on the number of full months employed in 2017 with awards issued at the end of the three-year period Pro-rated based on the number of full months employed during the performance period with awards issued at the end of the three-year period Varies. Settlement Settled in common stock at the end of the performance or vesting period (a) Adjustments to the performance of the Dow Jones U.S. Construction and Materials Index may be made in certain circumstances. (b) Early vesting for MSUs, performance shares and RSUs in situations where there is a change in control also requires a related loss of employment or diminution of duties. OTHER MSUs, performance shares, RSUs, and stock options and deferred shares associated with our deferred compensation program for non-employee directors that were not included in the computation of diluted earnings per share for those periods because their inclusion would be anti-dilutive were as follows: Three months ended March 31, (millions, common shares) 2017 2016 MSUs, performance shares, RSUs and stock options 1.0 1.7 Deferred shares associated with a deferred compensation program for non-employee directors — 0.2

Supplemental Balance Sheet Info

Supplemental Balance Sheet Information	3 Months Ended
	Mar. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Supplemental Balance Sheet Information	Supplemental Balance Sheet Information INVENTORIES Total inventories consisted of the following: (millions) March 31, 2017 December 31, 2016 Finished goods $ 134 $ 132 Work in progress 38 37 Raw materials 71 67 Total $ 243 $ 236 ASSET RETIREMENT OBLIGATIONS Changes in the liability for asset retirement obligations consisted of the following: Three months ended March 31, (millions) 2017 2016 Balance as of January 1 $ 113 $ 119 Accretion expense 1 2 Foreign currency translation — 1 Balance as of March 31 $ 114 $ 122

Stockholders' Equity

Stockholders' Equity	3 Months Ended
	Mar. 31, 2017
Equity [Abstract]
Treasury Stock and Accumulated Other Comprehensive Income (Loss)	TREASURY STOCK Changes in treasury stock for the three months ended March 31, 2017 and 2016 were as follows: March 31, 2017 March 31, 2016 (millions, except share data) Treasury Shares (000) Treasury Stock Treasury Shares (000) Treasury Stock Balance as of January 1 — $ — — $ — Stock issuances 150 4 67 1 Repurchase of common stock for tax withholdings related to stock based compensation (107 ) (3 ) (70 ) (1 ) Repurchase of common stock under share repurchase program (764 ) (25 ) — — Balance as of March 31 (721 ) $ (24 ) (3 ) $ — ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) Changes in the balances of each component of AOCI for the three months ended March 31, 2017 and 2016 were as follows: Derivatives Defined Benefit Plans Foreign Currency Translation AOCI (millions) 2017 2016 2017 2016 2017 2016 2017 2016 Balance as of January 1 $ 27 $ 20 $ (246 ) $ (221 ) $ (166 ) $ (113 ) $ (385 ) $ (314 ) Other comprehensive income (loss) before reclassifications, net of tax (6 ) (8 ) (1 ) (3 ) 40 24 33 13 Less: Amounts reclassified from AOCI, net of tax — (2 ) — — — — — (2 ) Net other comprehensive income (loss) (6 ) (6 ) (1 ) (3 ) 40 24 33 15 Balance as of March 31 $ 21 $ 14 $ (247 ) $ (224 ) $ (126 ) $ (89 ) $ (352 ) $ (299 ) Amounts reclassified from AOCI, net of tax, for the three months ended March 31, 2017 and 2016 , were as follows: Three months ended March 31, (millions) 2017 2016 Derivatives Net reclassification from AOCI for cash flow hedges included in cost of products sold $ — $ (3 ) Less: Income tax benefit on reclassification from AOCI included in income tax (expense) benefit — (1 ) Net amount reclassified from AOCI $ — $ (2 ) Defined Benefit Plans Net reclassification from AOCI for amortization of prior service benefit included in cost of products sold $ — $ (2 ) Net reclassification from AOCI for amortization of prior service cost included in selling and administrative expenses — 2 Less: Income tax benefit on reclassification from AOCI included in income tax (expense) benefit — — Net amount reclassified from AOCI $ — $ — We estimate that we will reclassify a net immaterial after-tax loss on derivatives from AOCI to earnings within the next 12 months.

Income Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2017
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes In the first quarter of 2017 , we recorded income tax expense of approximately $29 million , and our effective tax rate was 34.5% . In the first quarter of 2016, we recorded income tax expense of approximately $26 million , and our effective tax rate was 30.2% . The income tax expense for the three months ended both March 31, 2017 and 2016 reflected taxes from federal, foreign, state and local jurisdictions. Our effective tax rate in the first quarter of both 2016 and 2017 was lower than the U.S. statutory rate primarily because of earnings realized in countries that had lower statutory tax rates and our equity method income. Our effective tax rate in the future will depend on the portion of our profits earned within and outside the United States. As of March 31, 2017 , we had federal net operating loss, or NOL, carryforwards of approximately $846 million that are available to offset future federal taxable income and will expire in the years 2029 through 2032 , none of which are subject to Internal Revenue Code limitations under Section 382. In addition, as of that date, we had federal AMT credit carryforwards of approximately $45 million that are available to reduce future regular federal income taxes over an indefinite period and foreign tax credit carryforwards of $145 million that are available to offset future federal taxable income and expire in the years 2022 through 2026. As of December 31, 2016, the foreign tax credits were $143 million and are attributable to tax planning strategies to optimize foreign tax credit utilization and management’s intention to amend its tax returns for the tax years 2012-2014 in order to claim credits for previously deducted foreign tax. In order to fully realize these U.S. federal net deferred tax assets, taxable income of approximately $1.387 billion would need to be generated during the period before their expiration. As of March 31, 2017 , we had a gross deferred tax asset of $169 million related to our state NOLs and tax credit carryforwards. The NOLs will expire if unused in years 2018 through 2036. To the extent that we do not generate sufficient state taxable income within the statutory carryforward periods to utilize the NOL and tax credit carryforwards in these states, they will expire unused. During the first three months of 2017 , we recorded an increase in the valuation allowance against our deferred tax assets of $1 million for a total valuation allowance of $52 million . The increase in the valuation allowance relates to foreign tax credits generated in 2017 that may expire unused. The Internal Revenue Code imposes limitations on a corporation’s ability to utilize NOLs if it experiences an “ownership change” which can result from transactions increasing the ownership of certain stockholders in the stock of a corporation by more than 50 percentage points over a three -year period. If we were to experience an ownership change, utilization of our NOLs would be subject to an annual limitation that may be carried over to later years within the allowed NOL carryforward period. Over the entire carryforward period, we may not be able to use all our NOLs due to the aforementioned annual limitation. If an ownership change had occurred as of March 31, 2017 , our annual U.S. federal NOL utilization would have been limited to approximately $97 million per year.

Litigation

Litigation	3 Months Ended
	Mar. 31, 2017
Commitments and Contingencies Disclosure [Abstract]
Litigation	Litigation WALLBOARD PRICING LAWSUITS In the first quarter of 2015, USG, United States Gypsum Company, L&W Supply Corporation, and 7 other wallboard manufacturers were named as defendants in a lawsuit filed in federal court in California by 12 homebuilders alleging that since at least September 2011, U.S. wallboard manufacturers conspired to fix and raise the price of gypsum wallboard sold in the United States and to effectuate the alleged conspiracy by ending the practice of providing job quotes on wallboard. The lawsuit was transferred to the United States District Court for the Eastern District of Pennsylvania under the title In re: Domestic Drywall Antitrust Litigation, MDL No. 2437. In the second quarter of 2016, the Court dismissed with prejudice the portions of the homebuilders’ complaint alleging a conspiracy in 2014 and 2015, ruling that there were insufficient factual allegations to allow such a claim to go forward. The homebuilders' claims alleging a conspiracy prior to 2014 have not been dismissed, and the case proceeds as to those claims. USG is retaining the liability with respect to L&W Supply Corporation. Beginning in the third quarter of 2013, class action lawsuits making similar allegations with regard to Canada were filed in Quebec, Ontario and British Columbia courts on behalf of purchasers of wallboard in Canada and naming USG Corporation, United States Gypsum Company, CGC Inc., and other wallboard manufacturers as defendants. We believe that the cost, if any, of resolving the homebuilders’ lawsuit and Canadian class action litigation will not have a material effect on our results of operations, financial position or cash flows. ENVIRONMENTAL LITIGATION We have been notified by state and federal environmental protection agencies of possible involvement as one of numerous “potentially responsible parties” in a number of Superfund sites in the United States. As a potentially responsible party, we may be responsible to pay for some part of the cleanup of hazardous waste at those sites. In most of these sites, our involvement is expected to be minimal. In addition, we are involved in environmental cleanups of other property that we own or owned. As of March 31, 2017 and December 31, 2016 , we had an accruals of $17 million and $18 million , respectively, for our probable and reasonably estimable liability in connection with these matters. Our accruals take into account all known or estimated undiscounted costs associated with these sites, including site investigations and feasibility costs, site cleanup and remediation, certain legal costs, and fines and penalties, if any. However, we continue to review these accruals as additional information becomes available and revise them as appropriate. Based on the information known to us, we believe these environmental matters will not have a material effect on our results of operations, financial position or cash flows.

Gypsum Transportation Limited

Gypsum Transportation Limited	3 Months Ended
	Mar. 31, 2017
Property, Plant and Equipment [Abstract]
Property, Plant and Equipment Disclosure [Text Block]	Gypsum Transportation Limited We exited our shipping operations in the second quarter of 2015. In November 2015, we entered into a release and debt settlement agreement to recover a portion of our loss incurred when our former trading partner ceased performing under the contract . We recorded a recovery of receivable of $8 million in the first quarter of 2016, which is presented as $3 million within "Recovery of receivable", $1 million within "Interest income" and $4 million within "Other (expense) income, net" on our condensed consolidated statement of income.

Organization, Consolidation a23

Organization, Consolidation and Presentation of Financial Statements Presentation of Financial Statements (Tables)	3 Months Ended
	Mar. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of New Accounting Pronouncements Not yet Adopted	Select line items from our condensed consolidated statements of income for the three months ended March 31, 2017 and the year end December 31, 2016 which reflect the changes in presentation of net benefit costs are as follows. (millions) Three months ended March 31, 2017 Year ended December 31, 2016 After Adoption As Reported After Adoption As Reported Gross profit $ 158 $ 164 $ 700 $ 705 Operating profit 84 91 396 394 Other net periodic postretirement (benefit) costs (7 ) — 2 — Net income 55 55 510 510

Discontinued Operations (Tables

Discontinued Operations (Tables)	3 Months Ended
	Mar. 31, 2017
Discontinued Operations and Disposal Groups [Abstract]
Disposal Groups, Including Discontinued Operations	The summarized financial information related to L&W that has been excluded from continuing operations and reported as a discontinued operation is as follows: (millions) Three months ended March 31, 2016 Net sales $ 357 Cost of products sold 343 Gross profit 14 Selling and administrative expenses 3 Operating profit 11 Income tax expense (4 ) Income from discontinued operations $ 7

Equity Method Investments (Tabl

Equity Method Investments (Tables)	3 Months Ended
	Mar. 31, 2017
Equity Method Investments and Joint Ventures [Abstract]
Equity Method Investments	Summarized financial information for our equity method investments is as follows: Three months ended March 31, (millions) 2017 2016 USG Boral Building Products: Net sales $ 276 $ 229 Gross profit 86 65 Operating profit 35 23 Income from continuing operations before income taxes 38 24 Net income 26 15 Net income attributable to USG Boral Building Products 25 14 USG share of income from investment accounted for using the equity method 13 7 Translation gains or losses recorded in other comprehensive income were as follows: Three months ended March 31, (millions) 2017 2016 Translation gain $ 24 $ 17 Equity method investments as of March 31, 2017 and December 31, 2016 , were as follows: March 31, 2017 December 31, 2016 (dollars in millions) Carrying Value Ownership Percentage Carrying Value Ownership Percentage USG Boral Building Products $ 658 50% $ 621 50% Other equity method investments 7 33% - 50% 7 33% - 50% Total equity method investments $ 665 $ 628

Segments (Tables)

Segments (Tables)	3 Months Ended
	Mar. 31, 2017
Segment Reporting [Abstract]
Net sales and operating profit (loss) by segment	Segment results for our Gypsum and Ceilings segments were as follows: Three months ended March 31, (millions) 2017 2016 Net Sales : Gypsum $ 649 $ 628 Ceilings 120 121 Eliminations (2 ) (2 ) Total $ 767 $ 747 Operating Profit (Loss) : Gypsum $ 91 $ 109 Ceilings 23 28 Corporate (23 ) (21 ) Total $ 91 $ 116

Marketable Securities (Tables)

Marketable Securities (Tables)	3 Months Ended
	Mar. 31, 2017
Investments, Debt and Equity Securities [Abstract]
Investments in marketable securities	Our investments in marketable securities consisted of the following: As of March 31, 2017 As of December 31, 2016 (millions) Amortized Cost Fair Value Amortized Cost Fair Value Corporate debt securities $ 65 $ 65 $ 69 $ 69 U.S. government and agency debt securities 14 14 14 14 Non-U.S. government debt securities 1 1 — — Asset-backed debt securities 6 6 2 2 Certificates of deposit 7 7 6 6 Total marketable securities $ 93 $ 93 $ 91 $ 91
Contractual maturities of marketable securities	Contractual maturities of marketable securities as of March 31, 2017 were as follows: (millions) Amortized Cost Fair Value Due in 1 year or less $ 69 $ 69 Due in 1-5 years 24 24 Total marketable securities $ 93 $ 93

Debt (Tables)

Debt (Tables)	3 Months Ended
	Mar. 31, 2017
Debt Disclosure [Abstract]
Schedule of long-term debt instruments	Total debt, including the current portion of long-term debt, consisted of the following: (millions) March 31, December 31, 5.5% senior notes due 2025 $ 350 $ 350 7.75% senior notes due 2018 500 500 Industrial revenue bonds (due 2028 through 2034) 239 239 Total $ 1,089 $ 1,089 Less: Unamortized debt issuance costs 5 6 Total $ 1,084 $ 1,083
Other debt disclosure	(millions) March 31, December 31, Fair value of debt $ 1,128 $ 1,129 Accrued interest 14 31

Derivative Instruments (Tables)

Derivative Instruments (Tables)	3 Months Ended
	Mar. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of notional amounts of outstanding derivative positions	Derivative Instruments Type Hedged Item Aggregate Notional Amount Contracts Maturing Through Commodity Natural gas swaps Purchases of natural gas 33 million mmBTUs* December 31, 2021 Foreign Exchange Forward contracts Purchases of products and services denominated in a foreign currency $89 million December 31, 2018 Foreign Exchange Forward contracts Intercompany Loan $23 million May 31, 2017 * - millions of British Thermal Units
Pretax effects of derivative instruments on consolidated statements of operations	FINANCIAL STATEMENT INFORMATION The following are the pretax effects of derivative instruments on the condensed consolidated statements of income for the three months ended March 31, 2017 and 2016 . Amount of Gain or (Loss) Recognized in Other Comprehensive Income on Derivatives (Effective Portion) Location of Gain or (Loss) Reclassified from AOCI into Income (Effective Portion) Amount of Gain or (Loss) Reclassified from AOCI into Income (Effective Portion) (millions) 2017 2016 2017 2016 Derivatives in Cash Flow Hedging Relationships Commodity contracts $ (9 ) $ (5 ) Cost of products sold $ — $ (5 ) Foreign exchange contracts — (6 ) Cost of products sold — 2 Total $ (9 ) $ (11 ) $ — $ (3 ) For both commodity contracts and foreign exchange contracts, no ineffectiveness was recorded in three months ended March 31, 2017 and 2016 . Location of Gain or (Loss) Recognized in Income on Derivatives Amount of Gain or (Loss) Recognized in Income on Derivatives (millions) 2017 2016 Derivatives Not Designated as Hedging Instruments Commodity contracts Cost of products sold $ (1 ) $ (1 ) Total $ (1 ) $ (1 )
Fair values of derivative instruments and the location on the consolidated balance sheets	he following are the fair values of derivative instruments and the location on our accompanying condensed consolidated balance sheets as of March 31, 2017 and December 31, 2016 . Balance Sheet Location Fair Value Balance Sheet Location Fair Value (millions) 3/31/17 12/31/16 3/31/17 12/31/16 Derivatives in Cash Flow Hedging Relationships Commodity contracts Other current assets $ 4 $ 8 Accrued expenses $ 4 $ 4 Commodity contracts Other assets 1 3 Other liabilities 8 5 Foreign exchange contracts Other current assets 1 1 Accrued expenses 1 1 Total derivatives in cash flow hedging relationships $ 6 $ 12 $ 13 $ 10 Derivatives Not Designated as Hedging Instruments Commodity contracts Other current assets $ — $ 1 Accrued expenses $ — $ — Total derivatives not designated as hedging instruments $ — $ 1 $ — $ — Total derivatives Total assets $ 6 $ 13 Total liabilities $ 13 $ 10

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Mar. 31, 2017
Fair Value Disclosures [Abstract]
Assets and liabilities measured at fair value on a recurring basis	Our assets and liabilities measured at fair value on a recurring basis were as follows: Quoted Prices in Active Markets for Identical Assets (Level 1) Significant Other Observable Inputs (Level 2) Significant Unobservable Inputs (Level 3) Total (millions) 3/31/17 12/31/16 3/31/17 12/31/16 3/31/17 12/31/16 3/31/17 12/31/16 Cash equivalents $ 37 $ 38 $ 32 $ 34 $ — $ — $ 69 $ 72 Equity mutual funds 5 5 — — — — 5 5 Marketable securities: Corporate debt securities — — 65 69 — — 65 69 U.S. government and agency debt securities — — 14 14 — — 14 14 Non-U.S. government debt securities — — 1 — — — 1 — Asset-backed debt securities — — 6 2 — — 6 2 Certificates of deposit — — 7 6 — — 7 6 Derivative assets — — 6 13 — — 6 13 Derivative liabilities — — (13 ) (10 ) — — (13 ) (10 )

Employee Retirement Plans (Tabl

Employee Retirement Plans (Tables)	3 Months Ended
	Mar. 31, 2017
Compensation and Retirement Disclosure [Abstract]
Components of net pension and postretirement benefits costs	The components of net pension and postretirement benefit costs are summarized in the following table: Three months ended March 31, (millions) 2017 2016 Pension: Service cost of benefits earned $ 10 $ 11 Interest cost on projected benefit obligation 16 17 Expected return on plan assets (23 ) (22 ) Settlement — 2 Net amortization 5 5 Net pension cost (a) $ 8 $ 13 Postretirement: Service cost of benefits earned $ 1 $ 1 Interest cost on projected benefit obligation 1 1 Net amortization (6 ) (7 ) Net postretirement benefit (b) $ (4 ) $ (5 ) (a) Net pension cost, excluding settlement costs, includes expenses allocated to income from discontinued operations for L&W totaling $2 million for the three months ended March 31, 2016. (b) Net postretirement benefit includes a net benefit allocated to income from discontinued operations for L&W totaling $1 million for the three months ended March 31, 2016.

Share-Based Compensation (Table

Share-Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2017
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of awards granted during the period	Terms of the awards granted during the first three months of 2017 were as follows: MSUs Performance Shares RSUs Maximum shares/units earned Varies from 0% to 150% of the number of MSUs awarded depending on the actual performance of our stock price Varies from 0% to 200% of the number of performance shares awarded depending on the performance of our total stockholder return relative to the performance of the Dow Jones U.S. Construction and Materials Index (a) 100% Vesting Provisions Three-year performance period Three-year performance period Specified number of years from the grant date Vesting in the case of termination of employment due to death, disability, retirement or change in control during performance period (b) Pro-rated based on the number of full months employed in 2017 with awards issued at the end of the three-year period Pro-rated based on the number of full months employed during the performance period with awards issued at the end of the three-year period Varies. Settlement Settled in common stock at the end of the performance or vesting period (a) Adjustments to the performance of the Dow Jones U.S. Construction and Materials Index may be made in certain circumstances. (b) Early vesting for MSUs, performance shares and RSUs in situations where there is a change in control also requires a related loss of employment or diminution of duties. Awards granted during the first three months of 2017 , weighted average fair value, and assumptions used to determine fair value were as follows: MSUs Performance Shares RSUs Awards granted 371,346 112,732 49,000 Weighted average fair value (a) $ 35.79 $ 39.42 $ 31.36 Expected volatility (b) 32.10 % 32.10 % N/A Risk-free rate (c) 1.39 % 1.39 % N/A Expected term (in years) (d) 2.96 2.96 N/A Expected dividends — — N/A (a) Fair value of MSUs and Performance Shares is estimated on the date of grant using the Monte Carlo simulation that used the assumptions outlined above. Fair value of RSUs is equal to the closing price of our common stock on the date of grant. (b) The expected volatility rate was based on stock price history immediately prior to grant for a period commensurate with the expected term. (c) The risk-free rate was based on zero coupon U.S. government issues at the time of grant. (d) The expected term represents the period from the valuation date to the end of the performance period.
Schedule of antidilutive securities excluded from computation of earnings per share	MSUs, performance shares, RSUs, and stock options and deferred shares associated with our deferred compensation program for non-employee directors that were not included in the computation of diluted earnings per share for those periods because their inclusion would be anti-dilutive were as follows: Three months ended March 31, (millions, common shares) 2017 2016 MSUs, performance shares, RSUs and stock options 1.0 1.7 Deferred shares associated with a deferred compensation program for non-employee directors — 0.2

Supplemental Balance Sheet In33

Supplemental Balance Sheet Information (Tables)	3 Months Ended
	Mar. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Schedule of inventories	Total inventories consisted of the following: (millions) March 31, 2017 December 31, 2016 Finished goods $ 134 $ 132 Work in progress 38 37 Raw materials 71 67 Total $ 243 $ 236
Changes in the liability for asset retirement obligations	Changes in the liability for asset retirement obligations consisted of the following: Three months ended March 31, (millions) 2017 2016 Balance as of January 1 $ 113 $ 119 Accretion expense 1 2 Foreign currency translation — 1 Balance as of March 31 $ 114 $ 122

Stockholders' Equity (Tables)

Stockholders' Equity (Tables)	3 Months Ended
	Mar. 31, 2017
Equity [Abstract]
Schedule of Treasury Stock	Changes in treasury stock for the three months ended March 31, 2017 and 2016 were as follows: March 31, 2017 March 31, 2016 (millions, except share data) Treasury Shares (000) Treasury Stock Treasury Shares (000) Treasury Stock Balance as of January 1 — $ — — $ — Stock issuances 150 4 67 1 Repurchase of common stock for tax withholdings related to stock based compensation (107 ) (3 ) (70 ) (1 ) Repurchase of common stock under share repurchase program (764 ) (25 ) — — Balance as of March 31 (721 ) $ (24 ) (3 ) $ —
Changes in the balances of each component of AOCI	Changes in the balances of each component of AOCI for the three months ended March 31, 2017 and 2016 were as follows: Derivatives Defined Benefit Plans Foreign Currency Translation AOCI (millions) 2017 2016 2017 2016 2017 2016 2017 2016 Balance as of January 1 $ 27 $ 20 $ (246 ) $ (221 ) $ (166 ) $ (113 ) $ (385 ) $ (314 ) Other comprehensive income (loss) before reclassifications, net of tax (6 ) (8 ) (1 ) (3 ) 40 24 33 13 Less: Amounts reclassified from AOCI, net of tax — (2 ) — — — — — (2 ) Net other comprehensive income (loss) (6 ) (6 ) (1 ) (3 ) 40 24 33 15 Balance as of March 31 $ 21 $ 14 $ (247 ) $ (224 ) $ (126 ) $ (89 ) $ (352 ) $ (299 )
Amounts reclassified from AOCI, net of tax	Amounts reclassified from AOCI, net of tax, for the three months ended March 31, 2017 and 2016 , were as follows: Three months ended March 31, (millions) 2017 2016 Derivatives Net reclassification from AOCI for cash flow hedges included in cost of products sold $ — $ (3 ) Less: Income tax benefit on reclassification from AOCI included in income tax (expense) benefit — (1 ) Net amount reclassified from AOCI $ — $ (2 ) Defined Benefit Plans Net reclassification from AOCI for amortization of prior service benefit included in cost of products sold $ — $ (2 ) Net reclassification from AOCI for amortization of prior service cost included in selling and administrative expenses — 2 Less: Income tax benefit on reclassification from AOCI included in income tax (expense) benefit — — Net amount reclassified from AOCI $ — $ —

Presentation of Financial State

Presentation of Financial Statements (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Accounting Standards Update 2016-09
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle in period of adoption	$ 25
Gross profit | Accounting Standards Update 2017-07
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financial statement line item after adoption	158	$ 700
Financial statement line item as reported	164	705
Operating Profit | Accounting Standards Update 2017-07
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financial statement line item after adoption	84	396
Financial statement line item as reported	91	394
Other net periodic postretirement (benefit) cost [Member] | Accounting Standards Update 2017-07
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financial statement line item after adoption	(7)	2
Financial statement line item as reported	0	0
Net income | Accounting Standards Update 2017-07
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financial statement line item after adoption	55	510
Financial statement line item as reported	$ 55	$ 510

Discontinued Operations (Detail

Discontinued Operations (Details) $ in Millions	3 Months Ended
	Mar. 31, 2016USD ($)
Discontinued Operations and Disposal Groups [Abstract]
Net sales	$ 357
Cost of products sold	343
Gross profit	14
Selling and administrative expenses	3
Operating profit	11
Income tax expense	(4)
Income from discontinued operations	$ 7

Discontinued Operations (Deta37

Discontinued Operations (Details Textual) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Discontinued Operations and Disposal Groups [Abstract]
Sales to discontinued operations previously eliminated in consolidation	$ 131	$ 145
Cash inflow from discontinued operation	$ 109

Equity Method Investments (Deta

Equity Method Investments (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 665	$ 628
USG Boral Building Products
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 658	$ 621
Ownership percentage	50.00%	50.00%
Other equity method investments
Schedule of Equity Method Investments [Line Items]
Equity method investments	$ 7	$ 7
Other equity method investments | Minimum
Schedule of Equity Method Investments [Line Items]
Ownership percentage	33.00%	33.00%
Other equity method investments | Maximum
Schedule of Equity Method Investments [Line Items]
Ownership percentage	50.00%	50.00%

Equity Method Investments (De39

Equity Method Investments (Details 1) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Schedule of Equity Method Investments [Line Items]
Translation gain	$ 40	$ 24
USG Boral Building Products [Member]
Schedule of Equity Method Investments [Line Items]
Translation gain	$ 24	$ 17

Equity Method Investments (De40

Equity Method Investments (Details 2) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Schedule of Equity Method Investments [Line Items]
USG share of income from investment accounted for using the equity method	$ 13	$ 7
USG Boral Building Products
Schedule of Equity Method Investments [Line Items]
Gross profit	86	65
Income from continuing operations before income taxes	38	24
Net income	26	15
Net income attributable to USG Boral Building Products	25	14
USG share of income from investment accounted for using the equity method	13	7
USG Boral Building Products | USG Boral Building Products
Schedule of Equity Method Investments [Line Items]
Net sales	276	229
Operating profit	$ 35	$ 23

Equity Method Investments (De41

Equity Method Investments (Details Textual) - USD ($) $ in Millions	Feb. 27, 2014	Mar. 31, 2017	Dec. 31, 2016
USG Boral Building Products
Schedule of Equity Method Investments [Line Items]
Ownership percentage		50.00%	50.00%
Undistributed earnings		$ 56
Contingent consideration for second performance period	$ 50
Second performance period for contingent consideration	5 years
Boral Limited | USG Boral Building Products
Schedule of Equity Method Investments [Line Items]
Ownership percentage by joint venture partner of equity method investment		50.00%
USG Boral Building Products
Schedule of Equity Method Investments [Line Items]
Loan receivable from related party		$ 15	$ 15

Segments (Details)

Segments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Net Sales:
Net sales	$ 767	$ 747
Operating Profit (Loss):
Operating profit	91	116
Operating segments | Gypsum
Net Sales:
Net sales	649	628
Operating Profit (Loss):
Operating profit	91	109
Operating segments | Ceilings
Net Sales:
Net sales	120	121
Operating Profit (Loss):
Operating profit	23	28
Corporate
Operating Profit (Loss):
Operating profit	(23)	(21)
Eliminations
Net Sales:
Net sales	$ (2)	$ (2)

Marketable Securities (Details

Marketable Securities (Details 1) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Investments in marketable securities
Amortized Cost	$ 93	$ 91
Fair Value	93	91
Corporate debt securities
Investments in marketable securities
Amortized Cost	65	69
Fair Value	65	69
U.S. government and agency debt securities
Investments in marketable securities
Amortized Cost	14	14
Fair Value	14	14
Non-U.S. government debt securities
Investments in marketable securities
Amortized Cost	1	0
Fair Value	1	0
Asset-backed debt securities
Investments in marketable securities
Amortized Cost	6	2
Fair Value	6	2
Certificates of deposit
Investments in marketable securities
Amortized Cost	7	6
Fair Value	$ 7	$ 6

Marketable Securities (Detail44

Marketable Securities (Details 2) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Contractual maturities of marketable securities
Due in 1 year or less, amortized cost	$ 69
Due in 1-5 years, amortized cost	24
Marketable securities, amortized cost	93	$ 91
Due in 1 year or less, fair value	69
Due in 1-5 years, fair value	24
Marketable securities, fair value	$ 93	$ 91

Debt (Details)

Debt (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Debt Instrument [Line Items]
Total debt	$ 1,089	$ 1,089
Deferred financing fees	5	6
Long term debt net of unamortized debt issuance costs	$ 1,084	$ 1,083
5.5% senior notes due 2025
Debt Instrument [Line Items]
Debt instrument interest rate	5.50%	5.50%
Total debt	$ 350	$ 350
7.75% senior notes due 2018
Debt Instrument [Line Items]
Debt instrument interest rate	7.75%	7.75%
Total debt	$ 500	$ 500
Industrial revenue bonds (due 2028 through 2034)
Debt Instrument [Line Items]
Total debt	$ 239	$ 239

Debt (Details Textual)

Debt (Details Textual) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Debt Instrument [Line Items]
Loss on extinguishment of debt	$ 0	$ (2)
Fair value of debt	1,128		$ 1,129
Accrued interest	14		$ 31
Credit facility
Debt Instrument [Line Items]
Borrowing available under credit facility	125
Outstanding lines of credit	$ 0
Interest rate at period end for line of credit facility	2.15%
Amount of letters of credit outstanding	$ 37
CGC Credit Facility CAD
Debt Instrument [Line Items]
Interest rate at period end for line of credit facility	1.94%
6.3% senior notes due 2016
Debt Instrument [Line Items]
Repurchase of outstanding debt		$ 62
Debt instrument interest rate	6.30%	6.30%	6.30%
Premiums paid on repurchased debt		$ 2
Accrued interest paid on repurchased debt		1
Amount paid in consideration of debt repurchase		$ 65

Derivative Instruments (Details

Derivative Instruments (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Derivatives in Cash Flow Hedging Relationships
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in Other Comprehensive Income on Derivatives (Effective Portion)	$ (9)	$ (11)
Amount of Gain or (Loss) Reclassified from AOCI into Income (Effective Portion)	0	(3)
Derivatives in Cash Flow Hedging Relationships | Commodity contracts | Cash flow hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in Other Comprehensive Income on Derivatives (Effective Portion)	(9)	(5)
Derivatives in Cash Flow Hedging Relationships | Commodity contracts | Cost of products sold | Cash flow hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Reclassified from AOCI into Income (Effective Portion)	0	(5)
Derivatives in Cash Flow Hedging Relationships | Foreign exchange contracts | Cash flow hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in Other Comprehensive Income on Derivatives (Effective Portion)	0	(6)
Derivatives in Cash Flow Hedging Relationships | Foreign exchange contracts | Cost of products sold | Cash flow hedging
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Reclassified from AOCI into Income (Effective Portion)	0	2
Derivatives Not Designated as Hedging Instruments
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in Income on Derivatives	(1)	(1)
Derivatives Not Designated as Hedging Instruments | Commodity contracts | Cost of products sold
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in Income on Derivatives	$ (1)	$ (1)

Derivative Instruments (Detai48

Derivative Instruments (Details 1) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Derivatives, Fair Value [Line Items]
Derivative assets	$ 6	$ 13
Derivative liabilities	13	10
Derivatives Not Designated as Hedging Instruments
Derivatives, Fair Value [Line Items]
Derivative assets	0	1
Derivative liabilities	0	0
Derivatives Not Designated as Hedging Instruments | Commodity contracts | Other current assets
Derivatives, Fair Value [Line Items]
Derivative assets	0	1
Derivatives Not Designated as Hedging Instruments | Commodity contracts | Accrued expenses
Derivatives, Fair Value [Line Items]
Derivative liabilities	0	0
Cash flow hedging | Derivatives in Cash Flow Hedging Relationships
Derivatives, Fair Value [Line Items]
Derivative assets	6	12
Derivative liabilities	13	10
Cash flow hedging | Derivatives in Cash Flow Hedging Relationships | Commodity contracts | Other current assets
Derivatives, Fair Value [Line Items]
Derivative assets	4	8
Cash flow hedging | Derivatives in Cash Flow Hedging Relationships | Commodity contracts | Other assets
Derivatives, Fair Value [Line Items]
Derivative assets	1	3
Cash flow hedging | Derivatives in Cash Flow Hedging Relationships | Commodity contracts | Accrued expenses
Derivatives, Fair Value [Line Items]
Derivative liabilities	4	4
Cash flow hedging | Derivatives in Cash Flow Hedging Relationships | Commodity contracts | Other liabilities
Derivatives, Fair Value [Line Items]
Derivative liabilities	8	5
Cash flow hedging | Derivatives in Cash Flow Hedging Relationships | Foreign exchange contracts | Other current assets
Derivatives, Fair Value [Line Items]
Derivative assets	1	1
Cash flow hedging | Derivatives in Cash Flow Hedging Relationships | Foreign exchange contracts | Accrued expenses
Derivatives, Fair Value [Line Items]
Derivative liabilities	$ 1	$ 1

Derivative Instruments (Detai49

Derivative Instruments (Details Textual) MMBTU in Millions		3 Months Ended
		Mar. 31, 2017USD ($)MMBTU	Mar. 31, 2016USD ($)
Derivative Instruments, Gain (Loss) [Line Items]
Typical hedging period		5 years
Net liability aggregate fair value		$ 7,000,000
Collateral provided to counterparties related to derivatives		$ 6,000,000
Cash flow hedging | Commodity contracts
Derivative Instruments, Gain (Loss) [Line Items]
Nonmonetary notional amount of derivatives | MMBTU	[1]	33
Loss on cash flow hedge ineffectiveness		$ 0	$ 0
Cash flow hedging | Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Loss on cash flow hedge ineffectiveness		0	$ 0
Intercompany loan | Cash flow hedging | Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional amounts of foreign exchange forward contracts		29,000,000
Purchases of products and services | Cash flow hedging | Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Notional amounts of foreign exchange forward contracts		$ 89,000,000
[1]	* - millions of British Thermal Units

Fair Value Measurements (Detail

Fair Value Measurements (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Assets and liabilities measured at fair value on a recurring basis
Cash equivalents	$ 69	$ 72
Equity mutual funds	5	5
Marketable securities	93	91
Derivative assets	6	13
Derivative liabilities	(13)	(10)
Corporate debt securities
Assets and liabilities measured at fair value on a recurring basis
Marketable securities	65	69
U.S. government and agency debt securities
Assets and liabilities measured at fair value on a recurring basis
Marketable securities	14	14
Non-U.S. government debt securities
Assets and liabilities measured at fair value on a recurring basis
Marketable securities	1	0
Asset-backed debt securities
Assets and liabilities measured at fair value on a recurring basis
Marketable securities	6	2
Certificates of deposit
Assets and liabilities measured at fair value on a recurring basis
Marketable securities	7	6
Quoted Prices in Active Markets for Identical Assets (Level 1)
Assets and liabilities measured at fair value on a recurring basis
Cash equivalents	37	38
Equity mutual funds	5	5
Derivative assets	0	0
Derivative liabilities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Corporate debt securities
Assets and liabilities measured at fair value on a recurring basis
Marketable securities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | U.S. government and agency debt securities
Assets and liabilities measured at fair value on a recurring basis
Marketable securities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Non-U.S. government debt securities
Assets and liabilities measured at fair value on a recurring basis
Marketable securities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Asset-backed debt securities
Assets and liabilities measured at fair value on a recurring basis
Marketable securities	0	0
Quoted Prices in Active Markets for Identical Assets (Level 1) | Certificates of deposit
Assets and liabilities measured at fair value on a recurring basis
Marketable securities	0	0
Significant Other Observable Inputs (Level 2)
Assets and liabilities measured at fair value on a recurring basis
Cash equivalents	32	34
Equity mutual funds	0	0
Derivative assets	6	13
Derivative liabilities	(13)	(10)
Significant Other Observable Inputs (Level 2) | Corporate debt securities
Assets and liabilities measured at fair value on a recurring basis
Marketable securities	65	69
Significant Other Observable Inputs (Level 2) | U.S. government and agency debt securities
Assets and liabilities measured at fair value on a recurring basis
Marketable securities	14	14
Significant Other Observable Inputs (Level 2) | Non-U.S. government debt securities
Assets and liabilities measured at fair value on a recurring basis
Marketable securities	1	0
Significant Other Observable Inputs (Level 2) | Asset-backed debt securities
Assets and liabilities measured at fair value on a recurring basis
Marketable securities	6	2
Significant Other Observable Inputs (Level 2) | Certificates of deposit
Assets and liabilities measured at fair value on a recurring basis
Marketable securities	7	6
Significant Unobservable Inputs (Level 3)
Assets and liabilities measured at fair value on a recurring basis
Cash equivalents	0	0
Equity mutual funds	0	0
Derivative assets	0	0
Derivative liabilities	0	0
Significant Unobservable Inputs (Level 3) | Corporate debt securities
Assets and liabilities measured at fair value on a recurring basis
Marketable securities	0	0
Significant Unobservable Inputs (Level 3) | U.S. government and agency debt securities
Assets and liabilities measured at fair value on a recurring basis
Marketable securities	0	0
Significant Unobservable Inputs (Level 3) | Non-U.S. government debt securities
Assets and liabilities measured at fair value on a recurring basis
Marketable securities	0	0
Significant Unobservable Inputs (Level 3) | Asset-backed debt securities
Assets and liabilities measured at fair value on a recurring basis
Marketable securities	0	0
Significant Unobservable Inputs (Level 3) | Certificates of deposit
Assets and liabilities measured at fair value on a recurring basis
Marketable securities	$ 0	$ 0

Employee Retirement Plans (Deta

Employee Retirement Plans (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Pension
Components of net pension and postretirement benefits costs
Service cost of benefits earned	$ 10	$ 11
Interest cost on projected benefit obligation	16	17
Expected return on plan assets	(23)	(22)
Settlement	0	2
Net amortization	5	5
Net pension and postretirement cost	8	13	[1]
Postretirement
Components of net pension and postretirement benefits costs
Service cost of benefits earned	1	1
Interest cost on projected benefit obligation	1	1
Net amortization	(6)	(7)
Net pension and postretirement cost	$ (4)	(5)	[2]
Income from discontinued operations | Pension
Components of net pension and postretirement benefits costs
Net pension and postretirement cost		(2)
Income from discontinued operations | Postretirement
Components of net pension and postretirement benefits costs
Net pension and postretirement cost		$ 1
[1]	Net pension cost, excluding settlement costs, includes expenses allocated to income from discontinued operations for L&W totaling $2 million for the three months ended March 31, 2016.
[2]	Net postretirement benefit includes a net benefit allocated to income from discontinued operations for L&W totaling $1 million for the three months ended March 31, 2016.

Employee Retirement Plans (De52

Employee Retirement Plans (Details Textual) $ in Millions	3 Months Ended
	Mar. 31, 2017USD ($)
Defined Benefit Plan Disclosure [Line Items]
Estimated total contributions in current year	$ 74
Canada pension plan
Defined Benefit Plan Disclosure [Line Items]
Contribution by employer	$ 2

Share-Based Compensation (Detai

Share-Based Compensation (Details) $ / shares in Units, shares in Thousands	3 Months Ended
	Mar. 31, 2017USD ($)$ / sharesshares
MSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted | shares	371
Weighted average fair value (a) | $ / shares	$ 35.79	[1]
Expected volatility (b)	32.10%	[2]
Risk-free rate (c)	1.39%	[3]
Expected term (in years) (d)	2 years 11 months 14 days	[4]
Expected dividends | $	$ 0
Performance Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted | shares	113
Weighted average fair value (a) | $ / shares	$ 39.42	[1]
Expected volatility (b)	32.10%	[2]
Risk-free rate (c)	1.39%	[3]
Expected term (in years) (d)	2 years 11 months 14 days	[4]
Expected dividends | $	$ 0
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted | shares	49
Weighted average fair value (a) | $ / shares	$ 31.36	[1]
[1]	Fair value of MSUs and Performance Shares is estimated on the date of grant using the Monte Carlo simulation that used the assumptions outlined above. Fair value of RSUs is equal to the closing price of our common stock on the date of grant.
[2]	The expected volatility rate was based on stock price history immediately prior to grant for a period commensurate with the expected term.
[3]	The risk-free rate was based on zero coupon U.S. government issues at the time of grant.
[4]	The expected term represents the period from the valuation date to the end of the performance period.

Share-Based Compensation (Det54

Share-Based Compensation (Details 1) - shares shares in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Stock Compensation Plan [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	1	1.7
Deferred Compensation Program [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	0	0.2

Share-Based Compensation (Det55

Share-Based Compensation (Details Textual)	3 Months Ended
	Mar. 31, 2017
MSUs
Share Based Compensation [Abstract]
Vesting period	3 years
Minimum of range for number of shares earned	0.00%
Maximum of range for number of shares earned	150.00%
Performance Shares
Share Based Compensation [Abstract]
Vesting period	3 years
Minimum of range for number of shares earned	0.00%
Maximum of range for number of shares earned	200.00%

Supplemental Balance Sheet In56

Supplemental Balance Sheet Information (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Inventories
Finished goods	$ 134	$ 132
Work in process	38	37
Raw materials	71	67
Total	$ 243	$ 236

Supplemental Balance Sheet In57

Supplemental Balance Sheet Information (Details 1) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Beginning balance	$ 113	$ 119
Accretion expense	1	2
Foreign currency translation	0	1
Ending balance	$ 114	$ 122

Stockholders' Equity (Details)

Stockholders' Equity (Details) - USD ($) shares in Thousands, $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 0
Ending balance	$ (24)
Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance (in shares)	0	0
Stock issuances (in shares)	150	67
Repurchase of common stock for tax withholdings related to stock based compensation (in shares)	(107)	(70)
Repurchase of common stock under share repurchase program (in shares)	(764)	0
Ending balance (in shares)	(721)	(3)
Beginning balance	$ 0	$ 0
Stock issuances	4	1
Repurchase of common stock for tax withholdings related to stock based compensation	(3)	(1)
Repurchase of common stock under share repurchase program	(25)	0
Ending balance	$ (24)	$ 0

Stockholders' Equity (Details 1

Stockholders' Equity (Details 1) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	$ (385)	$ (314)
Other comprehensive income (loss) before reclassifications, net of tax	33	13
Less: Amounts reclassified from AOCI, net of tax	0	(2)
Other comprehensive income (loss), net of tax	33	15
Ending balance	(352)	(299)
Derivatives
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	27	20
Other comprehensive income (loss) before reclassifications, net of tax	(6)	(8)
Less: Amounts reclassified from AOCI, net of tax	0	(2)
Other comprehensive income (loss), net of tax	(6)	(6)
Ending balance	21	14
Defined Benefit Plans
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(246)	(221)
Other comprehensive income (loss) before reclassifications, net of tax	(1)	(3)
Less: Amounts reclassified from AOCI, net of tax	0	0
Other comprehensive income (loss), net of tax	(1)	(3)
Ending balance	(247)	(224)
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Beginning balance	(166)	(113)
Other comprehensive income (loss) before reclassifications, net of tax	40	24
Less: Amounts reclassified from AOCI, net of tax	0	0
Other comprehensive income (loss), net of tax	40	24
Ending balance	$ (126)	$ (89)

Stockholders' Equity (Details 2

Stockholders' Equity (Details 2) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net reclassification from AOCI included in cost of products sold	$ 603	$ 566
Net reclassification from AOCI included in selling and administrative expenses	73	68
Less: Income tax benefit on reclassification from AOCI included in income tax (expense) benefit	(29)	(26)
Net amount reclassified from AOCI	55	67
Derivatives | Amounts reclassified from AOCI, net of tax
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net reclassification from AOCI included in cost of products sold	0	(3)
Less: Income tax benefit on reclassification from AOCI included in income tax (expense) benefit	0	(1)
Net amount reclassified from AOCI	0	(2)
Defined Benefit Plans | Amounts reclassified from AOCI, net of tax
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net reclassification from AOCI included in cost of products sold	0	(2)
Net reclassification from AOCI included in selling and administrative expenses	0	2
Less: Income tax benefit on reclassification from AOCI included in income tax (expense) benefit	0	0
Net amount reclassified from AOCI	$ 0	$ 0

Stockholders' Equity (Details T

Stockholders' Equity (Details Textual) $ in Millions	3 Months Ended
	Mar. 31, 2017USD ($)
Equity [Abstract]
Estimated after-tax loss on derivatives to be reclassified from AOCI to earnings within the next 12 months	$ 0

Income Taxes (Details)

Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Income tax expense	$ (29)	$ (26)
Effective tax rate	34.50%	30.20%
Federal net operating loss carryforwards	$ 846
Federal alternative minimum tax credit carryforwards	45
Foreign deferred tax assets	145		$ 143
Minimum taxable income needed to fully realize the U.S. federal net deferred tax assets	1,387
Deferred tax assets related to state net operating loss and tax credit carryforwards	169
Increase (decrease) in valuation allowance against deferred tax asset	1
Valuation allowance on deferred tax assets	$ 52
Percentage of change in ownership	50.00%
Period of change in ownership	3 years
Approximate annual NOL utilization had an ownership change occurred	$ 97

Litigation (Details Textual)

Litigation (Details Textual) $ in Millions	Mar. 31, 2017USD ($)	Dec. 31, 2016USD ($)	Mar. 31, 2015Homebuilder
Commitments and Contingencies Disclosure [Abstract]
Number of Defendants Named in Class Action Lawsuits			7
Homebuilders Asserting Individual Claims			12
Accrual for probable and reasonably estimable liability for environmental cleanup | $	$ 17	$ 18

Gypsum Transportation Limited (

Gypsum Transportation Limited (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Property, Plant and Equipment [Abstract]
Recovered receivable per release and debt settlement agreement		$ 8
Recovery of receivable	$ 0	(3)
Recovered receivable recorded in interest income		1
Recovered receivable recorded in other income		$ 4