10-Q

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

þ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended March 31, 2017

OR

¨ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from to

Commission File Number 1-8864

USG CORPORATION

(Exact name of registrant as specified in its charter)

Delaware	36-3329400
(State or other jurisdiction of	(I.R.S. Employer
incorporation or organization)	Identification No.)
550 West Adams Street, Chicago, Illinois	60661-3676
(Address of principal executive offices)	(Zip code)

Registrant’s telephone number, including area code (312) 436-4000

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes þ No ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes þ No ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of large accelerated filer, accelerated filer, smaller reporting company, and emerging growth company in Rule 12b-2 of the Exchange Act.

Large accelerated filer	þ	Accelerated filer	¨
Non-accelerated filer	¨	(Do not check if a smaller reporting company)
		Smaller reporting company	¨
		Emerging growth company	¨

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ¨

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act). Yes o No þ

The number of shares of the registrant’s common stock outstanding as of March 31, 2017 was 145,792,158.

Table of Contents

		Page
PART I  FINANCIAL INFORMATION
Item 1.	Financial Statements (unaudited):
	Condensed Consolidated Statements of Income: Three Months Ended March 31, 2017 and 2016	3
	Condensed Consolidated Statements of Comprehensive Income (Loss): Three Months Ended March 31, 2017 and 2016	4
	Condensed Consolidated Balance Sheets: As of March 31, 2017 and December 31, 2016	5
	Condensed Consolidated Statements of Cash Flows: Three Months Ended March 31, 2017 and 2016	6
	Notes to Condensed Consolidated Financial Statements	7
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	19
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	31
Item 4.	Controls and Procedures	31
PART II.  OTHER INFORMATION
Item 1.	Legal Proceedings	32
Item 1A.	Risk Factors	32
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	32
Item 4.	Mine Safety Disclosures	32
Item 6.	Exhibits	32
	Signatures	33

2

PART I. FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS

USG CORPORATION

CONDENSED CONSOLIDATED STATEMENTS OF INCOME

(Unaudited)

(millions, except per-share and share data)	Three months ended March 31,
	2017			2016
Net sales	$	767		$	747
Cost of products sold	603			566
Gross profit	164			181
Selling and administrative expenses	73			68
Recovery of receivable	—			(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	—			(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	—			7
Net income	$	55		$	67
Earnings per average common share - basic:
Income from continuing operations	$	0.38		$	0.41
Income from discontinued operations	—			0.05
Net income	$	0.38		$	0.46
Earnings per average common share - diluted:
Income from continuing operations	$	0.37		$	0.41
Income from discontinued operations	—			0.05
Net income	$	0.37		$	0.46
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

See accompanying Notes to Condensed Consolidated Financial Statements.

3

USG CORPORATION

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)

(Unaudited)

	Three months ended March 31,
(millions)
	2017			2016
Net income	$	55		$	67
Other comprehensive income (loss), net of tax:
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	—			(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	—			—
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, net of tax	$	33		$	15
Comprehensive income	$	88		$	82

See accompanying Notes to Condensed Consolidated Financial Statements.

4

USG CORPORATION

CONDENSED CONSOLIDATED BALANCE SHEETS

(Unaudited)

(millions, except share data)	March 31, 2017			December 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			—
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	—			—
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		)	—
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

See accompanying Notes to Condensed Consolidated Financial Statements.

5

USG CORPORATION

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited)

(millions)	Three months ended March 31,
	2017			2016
Operating Activities
Net income	$	55		$	67
Less: income from discontinued operations	—			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	—			2
Recovery of receivable	—			(3		)
Share-based compensation expense	4			4
Deferred income taxes	29			25
Income from equity method investments	(13		)	(7		)
Pension settlement	—			2
Change in operating assets and liabilities	(138		)	(158		)
Other, net	1			(5		)
Net cash used for operating activities of continuing operations	(29		)	(46		)
Net cash (used for) provided by operating activities of discontinued operations	(1		)	16
Net cash used for operating activities	$	(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	—			9
Net cash used for investing activities of continuing operations	(41		)	—
Net cash provided by (used for) investing activities of discontinued operations	6			(1		)
Net cash used for investing activities	$	(35	)	$	(1	)
Financing Activities
Repayment of debt	—			(64		)
Issuance of common stock	3			—
Repurchase of common stock	(25		)	—
Repurchases of common stock to satisfy employee tax withholding obligations	(3		)	(1		)
Net cash used for 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	(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

See accompanying Notes to Condensed Consolidated Financial Statements.

6

USG CORPORATION

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

In the following Notes to Condensed Consolidated Financial Statements, “USG,” “we,” “our” and “us” refer to USG Corporation, a Delaware corporation, and its subsidiaries included in the condensed consolidated financial statements, except as otherwise indicated or as the context otherwise requires.

1. 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 endedMarch 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.

7

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.

2.    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

8

Additionally, upon the close of the sale, we entered into a supply agreement with L&W. For the three months endedMarch 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 endedMarch 31, 2017 related to payments on trade receivables.

3.    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

9

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.

4.     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

5. 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.

10

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.

6.     Debt

Total debt, including the current portion of long-term debt, consisted of the following:

(millions)	March 31, 2017		December 31, 2016
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, 2017		December 31, 2016
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.

11

7. 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	)

12

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.

8.     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		)

13

9.    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.

10.    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.

14

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

11.    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

15

12.    Stockholders' Equity

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 endedMarch 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.

16

13. 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.

17

14. 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.

15. 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.

18

ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

In the following Management’s Discussion and Analysis of Financial Condition and Results of Operations, “USG,” “we,” “our” and “us” refer to USG Corporation, a Delaware corporation, and its subsidiaries included in the condensed consolidated financial statements, except as otherwise indicated or as the context otherwise requires.

Overview

We are a leading manufacturer of building products and innovative building solutions. We produce a wide range of products for use in new residential, new nonresidential, and residential and nonresidential repair and remodel construction as well as products used in certain industrial processes. We estimate that during the first three months of 2017 in North America:

• residential and nonresidential repair and remodel activity accounted for approximately 52% of our net sales,

• new residential construction accounted for approximately 31% of our net sales,

• new nonresidential construction accounted for approximately 14% of our net sales, and

• other activities accounted for approximately 3% of our net sales.

During the first quarter of 2017, we expanded our wallboard portfolio with the launch of USG Sheetrock^® Brand EcoSmart Panels. EcoSmart is our next generation of ultra-light wallboard in our USG Sheetrock^® gypsum panels portfolio and is a sustainable and specifiable lightweight panel.

SEGMENTS

Our operations are organized into three segments: Gypsum, Ceilings and USG Boral Building Products, or UBBP. 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 and 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 to third party customers prior to March 31, 2016. All L&W sales subsequent to the close of the transaction including those under a supply agreement that governs the sales of wallboard and certain other products from USG to L&W are included in net sales on our condensed consolidated statements of income.

Gypsum: Our Gypsum segment manufactures and markets gypsum and related products in the United States, Canada Mexico and Latin America. It includes United States Gypsum Company, or U.S. Gypsum, in the United States, CGC Inc., or CGC, in Canada, USG Mexico, S.A. de C.V., or USG Mexico, and subsidiaries in 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’s products are used in a variety of building applications to construct walls, ceilings, roofs and floors of residential, commercial and institutional buildings, as well as in certain industrial applications. The major product lines within the Gypsum segment are:

Wallboard	Sheetrock® brand gypsum wallboard and Securock® brand glass mat sheathing portfolios
Surfaces	Sheetrock® brand joint compound portfolio, as well as corner bead, joint tape and plaster
Substrates	Durock® brand cement board, Fiberock® brand backerboard, Levelrock® brand systems of poured gypsum flooring, Securock® brand roof board, ExoAir® 430 brand air-water barrier system, industrial gypsum, and construction plaster products, sold under the brand names Red Top®, Imperial®, Diamond® and Supremo®

Ceilings: Our Ceilings segment manufactures and markets interior ceilings systems products in the United States, Canada, Mexico and Latin America. Ceilings includes USG Interiors, LLC, or USG Interiors in the United States, CGC, and USG Mexico and subsidiaries in Latin America. Ceilings is a leading supplier of interior ceilings products used primarily in commercial applications. Ceilings manufactures ceiling tile in the United States and ceiling grid in the United States and Canada. It markets ceiling tile and ceiling grid in the United States, Canada, Mexico, and Latin America.

USG Boral Building Products: USG Boral Building Products, or UBBP, is our 50/50 joint ventures with Boral Limited, or Boral. UBBP manufactures, distributes and sells certain building products, mines raw gypsum and sells natural and synthetic

19

gypsum throughout Asia, Australasia and the Middle East. UBBP manufactures and distributes products for wall, ceiling, floor lining and exterior systems that utilize gypsum wallboard, referred to as plasterboard in the region in which UBBP operates, mineral fiber ceiling tiles, steel grid and joint compound.

Geographic Information: For the first three months of 2017, we recorded $767 million of net sales in our condensed consolidated statements of income, of which approximately 83% were attributable to the United States, approximately 12% were attributable to Canada and other foreign countries accounted for the remaining 5%. Net sales for UBBP, which are not included in our condensed consolidated statement of income, were $276 million for the first three months of 2017, of which approximately 33% were attributable to Australia, 24% to South Korea, 12% to Thailand, 7% to China, and 24% to South East Asian and Middle Eastern countries.

MARKET CONDITIONS AND OUTLOOK

Our businesses are cyclical in nature and sensitive to changes in general economic conditions, including, in particular, conditions in the housing and construction-based markets in North America and in Asia and Australasia. Our expansion via UBBP into the markets of Asia, Australasia, and the Middle East has significantly increased our exposure to the economic conditions in those areas. However, the UBBP investment has helped diversify USG's overall exposure to changes in the North American economic conditions.

For the new residential construction market, housing starts are a good indicator of demand for our gypsum products. Installation of our gypsum products into a single family home typically follows a housing start by 90 to 120 days. In March 2017, the seasonally-adjusted annualized rate of housing starts reported by the U.S. Census Bureau was 1.22 million units. This is an increase from the March 2016 rate of 1.113 million units. In comparison, housing starts for all of 2016 were 1.174 million units. Most industry analysts believe that the recovery in new residential construction will continue, although the recovery over the next few years may be modest, and that over the longer term housing starts will reach historical averages. Industry analysts’ forecasts for 2017 housing starts in the United States included in the most recent Blue Chip Economic Indicators are 1.22 million to 1.33 million units, based on the average of the bottom ten and top ten forecasts included in the report, respectively. We currently estimate that 2017 housing starts in the United States will be 1.25 million units.

Demand for our products from new nonresidential construction is determined by floor space for which contracts are signed. Installation of gypsum and ceilings products typically follows signing of construction contracts by about 12 to 18 months. According to the most recent construction market forecast from Dodge Data & Analytics, total floor space for which new nonresidential construction contracts were signed in the United States decreased 1% in 2016 compared with 2015. Dodge Data & Analytics forecasts that total floor space for which new nonresidential construction contracts in the United States are signed will increase approximately 6% in 2017 from the 2016 level. Dodge Data & Analytics' forecast includes several building types which do not generate significant demand for our products; therefore, we anticipate new nonresidential construction growth in our business sectors in 2017 compared to 2016 will increase low to mid single digits.

The repair and remodel market includes renovation of both residential and nonresidential buildings. As a result of the low levels of new home construction in recent years, this market currently accounts for the largest portion of our sales. Many buyers begin to remodel an existing home within two years of purchase. According to the National Association of Realtors, sales of existing homes in the United States were 5.45 million units in 2016, reflecting a 4% increase from the 2015 level of 5.25 million units. The seasonally adjusted annual rate of existing home sales was 5.71 million units in March 2017 and reflected the strongest month since February 2007, when 5.79 million units were sold. The March 2017 rate is 6% higher than the revised rate of 5.39 million in March 2016. The generally rising levels of existing home sales and home resale values in recent years have contributed to an increase in demand for our products from the residential repair and remodel market. We currently estimate that overall repair and remodel spending in 2017, compared to 2016, will increase by mid single digits.

The rate of recovery in the new residential construction market, new nonresidential construction market and the repair and remodel market still remains uncertain and will depend on broader economic circumstances, including employment, household formation, the home ownership rate, existing home price trends, availability of mortgage financing, interest rates, consumer confidence, job growth and discretionary business investment. An increase in interest rates, high levels of unemployment, restrictive lending practices, a decrease in consumer confidence or other adverse economic conditions could have a material adverse effect on our business, financial condition, operating results and cash flows. Our businesses are also affected by a variety of other factors beyond our control, including the inventory of unsold homes, the level of foreclosures, home resale rates, housing affordability, office and retail vacancy rates and foreign currency exchange rates. Since we operate in a variety of geographic markets, our businesses are subject to the economic conditions in each of these geographic markets. General economic downturns or localized downturns or financial concerns in the regions where we have operations may have a material adverse effect on our business, financial condition, results of operations and cash flows.

20

We expect modest improvement over the next twelve months in the construction industries of Canada and Mexico. Other international markets, including those that are within the UBBP territory, provide opportunities for our operations to serve the demand in these regions. Australia is expected to experience a decline in housing starts; however, these housing starts are expected to remain above the long-term average. South Korea is expecting continued growth in its residential sector although the overall construction industry is expected to slow. Several emerging markets which are within the UBBP territory are forecast to experience steady growth. The international markets within the UBBP territory are adopting Western practices of building which provide more opportunities. We anticipate that the results from UBBP will enable us to counteract some of the potential cyclicality in our North American business.

Our Gypsum segment has generally improved with the modest recovery in residential housing, although it continues to be adversely affected by the low level of residential and other construction activity compared to historical averages. Our Ceilings segment, which primarily serves the commercial markets, has shown some improvement. However, it continues to be adversely affected by the low levels of new commercial construction activity as compared to historical averages. Our Ceilings segment is also adversely affected by changing construction preferences such as open plenum.

Industry shipments of gypsum board in the United States (including gypsum wallboard, other gypsum-related paneling products and imports), as reported by the Gypsum Association, were an estimated 6.0 billion square feet in the first three months of 2017, down approximately 3% compared with 6.2 billion square feet in the first three months of 2016. We estimate that industry shipments in the United States for all of 2017 will increase mid single digits from 25.0 billion square feet in 2016.

There is excess wallboard production capacity industry-wide in the United States. Industry capacity in the United States was approximately 33.4 billion square feet as of January 1, 2017. We estimate that the industry capacity utilization rate was approximately 71% and 74% during the first three months of 2017 and 2016, respectively.  Based on current industry trends and forecasts, demand for gypsum wallboard is expected to increase in 2017, but the magnitude of any increase will depend on the levels of housing starts and repair and remodel activity, among other factors. We project that the industry capacity utilization rate will experience a modest increase in 2017 compared to 2016.

We could experience pressure on gypsum wallboard selling prices and our gross margins at these levels of capacity utilization. U.S. Gypsum implemented a price increase for wallboard effective in January 2017. However, it is uncertain that we will be able to maintain the increase or obtain additional price increases in our selling prices. If we are unable to maintain or implement price increases, our net sales, operating results and cash flows may be materially and adversely impacted.

CURRENCY IMPACT

Currency impacts on consolidated and segment results have been derived by translating current period results at the quarter-to-date average foreign currency rates for the quarter ended March 31, 2016.

21

Consolidated Results of Operations

(dollars in millions, except per-share data)	2017			2016			$ Favorable (Unfavorable)			% Favorable (Unfavorable)
Three months ended March 31:
Net sales	$	767		$	747		$	20		3	%
Cost of products sold	603			566			(37		)	(7	%)
Gross profit	164			181			(17		)	(9	)%
Selling and administrative expenses	73			68			(5		)	(7	)%
Recovery of receivable	—			(3		)	(3		)	(100	)%
Operating profit	91			116			(25		)	(22	)%
Income from equity method investments	13			7			6			86	%
Interest expense	(20		)	(40		)	20			50	%
Interest income	1			2			(1		)	50	%
Loss on extinguishment of debt	—			(2		)	2			100	%
Other (expense) income, net	(1		)	3			(4		)	*
Income before continuing operations before income taxes	84			86			(2		)	(2	%)
Income tax expense	(29		)	(26		)	(3		)	(12	)%
Income from continuing operations	$	55		$	60		(5		)	(8	%)
Income from discontinued operations, net of tax	$	—		$	7		(7		)	(100	%)
Net income	$	55		$	67		$	(12	)	(18	%)
Diluted earnings per share - net income	$	0.37		$	0.46		$	(0.09	)	(20	%)
*not meaningful

NET SALES

Consolidated net sales for the first quarter of 2017 increased $20 million, or 3%, from the first quarter of 2016. This reflected higher net sales for our Gypsum segment due primarily to higher average selling price offset by a small decrease in net sales from our Ceilings segment due to lower volumes. Sales for our Gypsum segment increased 3% which reflected higher average selling price of gypsum wallboard and increased shipments of joint compound offset by lower volumes of gypsum wallboard. The decrease in net sales of 1% for our Ceilings segment was driven by decreased shipments of both ceiling grid and ceiling tile. On a consolidated basis for the comparative periods, the impact of foreign currency translation was not material.

GROSS PROFIT

Gross profit for the first quarter of 2017decreased$17 million, or 9%, compared with the first quarter of 2016. Gross profit as a percentage of net sales was 21.4% for the first quarter of 2017, compared with 24.2% for the first quarter of 2016. The decrease reflected lower margins in both our Gypsum and Ceilings segments due to an increase in manufacturing costs. The decrease in gross margin for our Gypsum segment was driven primarily by increased per unit costs for Gypsum products due to higher average price of waste paper and synthetic gypsum and higher per unit costs due to lower volumes. The decrease in gross margin for our Ceilings segment also reflected higher per unit costs for both ceiling grid and ceiling tile due to lower volumes.

SELLING AND ADMINISTRATIVE EXPENSES

Selling and administrative expenses totaled $73 million in the first quarter of 2017 compared to $68 million in the first quarter of 2016. As a percentage of net sales, selling and administrative expenses increased to 9.5% for the first quarter of 2017 from 9.1% for the first quarter of 2016. The increase as a percentage of net sales reflected higher costs for compensation, marketing and services, including those in support of growth platforms.

RECOVERY ON RECEIVABLE

In the first quarter of 2016, we received the remaining payments under a settlement agreement with our former trading partner of which $3 million represented a recovery of a previously deemed uncollectible receivable. The remaining payments received under the settlement agreement were recorded in "Interest income" and "Other (expense) income, net."

22

INCOME FROM EQUITY METHOD INVESTMENTS

Income from equity method investments, primarily UBBP, in the first quarter of 2017 was $13 million, an increase of $6 million, or 86% from the first quarter of 2016. This reflected improved operating results for UBBP due to higher margins in South Korea and Australia offset by an increase in selling and administrative expenses. The increase also reflected favorable currency impact of $1 million.

INTEREST EXPENSE

Interest expense was $20 million in the first quarter of 2017, down $20 million, or 50%, from the first quarter of 2016. The decrease in interest expense reflected lower debt levels.

LOSS ON EXTINGUISHMENT OF DEBT

In the first quarter of 2016, we recorded a loss of $2 million on the extinguishment of debt, including premiums, in connection with the open market purchases of the 6.3% Notes and write-off of deferred financing fees. See Note 6 to the condensed consolidated financial statements for additional information.

OTHER (EXPENSE) INCOME, NET

In the first quarter of 2017, we recorded $1 million of net other expense which primarily reflected net losses on foreign currency transactions. The $3 million of net other income recorded in the first quarter of 2016 was due primarily to the receipt of payments in conjunction with a settlement agreement with our former trading partner of which $4 million was recorded as other income. See Note 15 to the condensed consolidated financial statements for additional information.

INCOME TAX EXPENSE

We recorded income tax expense of $29 million in the first quarter of 2017 from federal, foreign, state and local jurisdictions. Our effective tax rate was 34.5% for the first quarter of 2017. In the first quarter of 2016, we recorded income tax expense of $26 million resulting in an effective tax rate of 30.2%.

INCOME FROM DISCONTINUED OPERATIONS

Income from discontinued operations of $7 million reflected the results of L&W for the first quarter of 2016.

23

Segment Results of Operations

GYPSUM

Net sales and operating profit (loss) for the businesses comprising our Gypsum segment were as follows:

	Three months ended March 31:
							Favorable (Unfavorable)
(millions)	2017			2016			$			%
Net sales
United States	$	555		$	536		$	19		4	%
Canada	83			82			1			1	%
Mexico / Latin America	49			44			5			11	%
Canadian Mining	—			—			—			—	%
Eliminations	(38		)	(34		)	(4		)	(12	)%
Total	$	649		$	628		$	21		3	%
Operating profit (loss)
United States	$	90		$	101		$	(11	)	(11	)%
Canada	1			6			(5		)	(83	)%
Mexico / Latin America	1			2			(1		)	(50	)%
Canadian Mining	(1		)	(3		)	2			67	%
Gypsum Transportation Limited	—			3			(3		)	(100	)%
Total	$	91		$	109		$	(18	)	(17	)%

United States: Net sales in the first quarter of 2017 were $555 million, up $19 million, or 4%, compared with the first quarter of 2016. The increase in net sales was due to the following:

					Volume					Price
(millions)	$		%		$			%		$			%
Change to Q1 2017 from Q1 2016
Sheetrock® brand gypsum wallboard	$	2	1	%	$	(10	)	(4	)%	$	12		5	%
Sheetrock® brand joint compound	5		5	%	6			6	%	(1		)	(1	)%
Other	12
Total increase in net sales	$	19	4	%

Sales for Sheetrock^® brand gypsum wallboard increased $2 million from the first quarter of 2016 to the first quarter of 2017 due to higher average selling price offset by decreased shipments. The increase in average selling price reflected a price increase that was effective in late January 2017. The decrease in volumes reflected the timing of the price increase in 2016 with additional purchases in the first quarter of 2016 in anticipation of the March 2016 price increase. Our premium Sheetrock^® brand UltraLight panels accounted for 66% of all of our wallboard shipments during the first quarter of 2017 which was consistent with the first quarter of 2016.

Sales of Sheetrock^® brand joint compound increased $5 million on increased volume driven primarily by higher shipments to the big box retailers. Sales of Durock^® brand cement board and Levelrock^® brand gypsum underlayment were primarily flat over the comparative period. Included in the increase in Other was higher sales of other surfaces and substrates products of $4 million, including Fiberock^® brand backerboard and Durock^® brand glass-mat tile backerboard. Also included in Other was a $6 million increase in sales for inventory sold by Gypsum that was included in L&W's inventory as of March 31, 2016 and a $2 million increase for freight.

24

Operating profit of $90 million was recorded in the first quarter of 2017 compared to $101 million recorded in the first quarter of 2016. The decrease of $11 million in operating profit reflected the following:

				Volume			Price			Cost
(millions)	$			$			$			$
Change to Q1 2017 from Q1 2016
Sheetrock® brand gypsum wallboard	$	(9	)	$	(5	)	$	12		$	(16	)
Sheetrock® brand joint compound	(1		)	2			(1		)	(2		)
Other	(1		)
Total decrease in operating profit	$	(11	)

The decrease in operating profit reflected lower gross profit for Sheetrock^® brand gypsum wallboard and Sheetrock^® brand joint compound. The decrease in gross profit for Sheetrock^® brand gypsum wallboard reflected higher cost per unit and lower volumes offset by higher average selling price. The higher per unit cost for Sheetrock^® brand gypsum wallboard reflected an increase in per unit cost of 15% for raw materials driven primarily by waste paper, for which costs are typically highest in the first quarter, and synthetic gypsum, 6% for conversion costs driven by higher labor costs and 10% for fixed costs due to lower volumes.

The decrease in gross profit for Sheetrock^® brand joint compound reflected higher per unit costs. Gross profit of Durock^® brand cement board and Levelrock^® brand gypsum underlayment were primarily flat over the comparative period.

Included in Other is the following:

• increase in gross profit of $2 million recorded on sales by Gypsum to L&W that were included in L&W's inventory at the end of the first quarter of 2016, offset by

• higher selling and administrative costs of $3 million in the first quarter of 2017 due primarily to higher compensation and benefit expenses and marketing costs.

Canada: Net sales in the first quarter of 2017 were $83 million, an increase of $1 million from $82 million in the first quarter of 2016. The change in sales reflected higher sales of gypsum wallboard of $4 million and favorable impact of currency translation of $3 million offset by a decrease in sales of joint compound of $1 million and lower freight of $5 million. The increase in sales of gypsum wallboard was driven by an increase of 18% in average selling price offset by a decrease of 9% in volume. The increase in average selling price reflected the final decisions of the Canadian authorities on the minimum pricing of gypsum board imported into Western Canada. The decisions were as a result of an anti-dumping proceeding initiated by a competing Canadian wallboard manufacturer. Operating profit in the first quarter of 2017 was $1 million, a decrease of $5 million from the first quarter of 2016. The decrease reflected a change of $3 million for an adjustment of an accrual for volume rebate incentives that was recorded in the first quarter of 2016, a $2 million increase for royalties and unfavorable impact of foreign currency of $1 million offset by higher gross profit of gypsum wallboard of $2 million.

Mexico / Latin America: Net sales for our gypsum businesses in Mexico and Latin America were $49 million for the first quarter of 2017, an increase of $5 million from the first quarter of 2016. The increase reflected higher sales of gypsum wallboard, joint treatment, Durock^® brand cement tile backerboard and drywall steel offset by the unfavorable impact due to fluctuations in currency of $3 million. Operating profit decreased to $1 million in the first quarter of 2017 from $2 million in the first quarter of 2016 due primarily to unfavorable impact of foreign currency of $1 million and lower gross profit on other products of $3 million offset by improved gross margins on joint treatment of $3 million.

Canadian Mining: Our mining operation in Canada recorded no sales for both the first quarter of 2017 and the first quarter of 2016. Operating loss was $1 million for the first quarter of 2017 and $3 million for the first quarter of 2016. In the third quarter of 2016, we indefinitely idled our mining operations in Little Narrows, Nova Scotia, Canada which resulted in a decrease of operating costs.

Gypsum Transportation Limited: There were no sales for our shipping company, Gypsum Transportation Limited, or GTL, for the first quarter of 2017 or 2016 as we have exited this business. GTL recorded $3 million in operating profit in the first quarter of 2016 which reflected a recovery of a receivable of $3 million owed to GTL by its trading partner that was fully reserved for in 2014.

25

CEILINGS

Net sales and operating profit for the businesses comprising our Ceilings segment were as follows:

	Three months ended March 31:
							Favorable (Unfavorable)
(millions)	2017			2016			$			%
Net sales
United States	$	112		$	115		$	(3	)	(3	)%
Canada	13			13			—			—	%
Mexico / Latin America	7			8			(1		)	(13	)%
Eliminations	(12		)	(15		)	3			20	%
Total	$	120		$	121		$	(1	)	(1	)%
Operating profit
United States	$	21		$	26		$	(5	)	(19	)%
Canada	1			1			—			—	%
Mexico / Latin America	1			1			—			—	%
Total	$	23		$	28		$	(5	)	(18	)%

United States: Net sales for our domestic ceilings business in the first quarter of 2017 were $112 million, a decrease of $3 million, or 3%, from the first quarter of 2016. The decrease reflected the following:

						Volume					Price
(millions)	$			%		$			%		$		%
Change to Q1 2017 from Q1 2016
Ceiling grid	$	(2	)	(7	)%	$	(2	)	(7	)%	$	—	—	%
Ceiling tile	(4		)	(6	)%	(4		)	(6	)%	—		—	%
Other	3
Total decrease in net sales	$	(3	)	(3	)%

The decrease in sales of both ceiling grid and ceiling tile reflected timing of projects. Also impacting sales was an increase in customer incentive programs offset by a price increase implemented in the first quarter of 2017. The favorable change in other reflected a $4 million increase in sales for inventory sold by Ceilings that was included in L&W's inventory as of March 31, 2016 offset by a decrease in freight of $1 million due to lower shipments.

Operating profit was $21 million for the first quarter of 2017, a decrease of $5 million, or 19%, from the first quarter of 2016. The decrease reflected the following:

				Volume			Price		Cost
(millions)	$			$			$		$
Change to Q1 2017 from Q1 2016
Ceiling grid	$	(3	)	$	(1	)	$	—	$	(2	)
Ceiling tile	(4		)	(2		)	—		(2		)
Other	2
Total decrease in operating profit	$	(5	)

The decrease in operating profit reflected a decrease in gross profit for both ceiling grid and ceiling tile driven by lower volumes and higher per unit cost. The higher per unit cost for ceiling grid reflected higher per unit raw material cost led by higher steel prices, higher per unit conversion cost due to increased labor costs and higher per unit fixed cost due to lower volumes. The higher per unit cost for ceiling tile primarily reflected higher per unit fixed cost due to lower volumes, higher expenditures for maintenance and, to a lesser extent, higher per unit conversion cost due to increased labor costs and higher per

26

unit raw material cost including higher costs for waste paper. Offsetting the decrease in gross profit was lower selling and administrative expenses of $1 million and gross profit of $1 million recorded on sales by Ceilings to L&W that were included in L&W's inventory as of March 31, 2016.

Canada:  Net sales of $13 million for the first quarter of 2017 were flat as compared to the first quarter of 2016. Operating profit was $1 million for the first quarter of 2017 and unchanged from the first quarter of 2016.

Mexico / Latin America: Net sales of $7 million for the first quarter of 2017 decreased $1 million from the first quarter of 2016. Operating profit was $1 million for both the first quarter of 2017 and the first quarter of 2016.

USG BORAL BUILDING PRODUCTS

The following reflects the net sales and operating profit as recorded by UBBP and the equity income recorded by USG.

	Three months ended March 31:
					Favorable (Unfavorable)
(millions)	2017		2016		$		%
Net sales	$	276	$	229	$	47	21	%
Operating profit	35		23		12		52	%
Income from equity method investments - UBBP	13		7		6		86	%

Net sales for UBBP were $276 million in the first quarter of 2017 compared to $229 million for the first quarter of 2016. The increase of $47 million reflected increased plasterboard shipments in South Korea, India, Malaysia and Australia and favorable impact of currency translation of $7 million. The increase is offset by decreased sales in Indonesia and Vietnam. Plasterboard shipments increased 16% to 1.13 billion square feet for the first quarter of 2017 from 0.97 billion square feet for the first quarter of 2016. Additionally, volumes of metal studs increased 20%.

Operating profit increased $12 million to $35 million in the first quarter of 2017 compared to $23 million in the first quarter of 2016. Operating profit in 2016 reflected improved margins in South Korea and Australia, realized synergy savings and improved market acceptance of lightweight products offset by an increase in selling and administrative expenses. The increase also reflected favorable currency impact of $2 million.

Our share of net income of UBBP, which is recorded in income from equity method investment, increased $6 million in the first quarter of 2017 as compared to the first quarter of 2016. This increase reflected higher income recorded by UBBP and a favorable impact of foreign currency of $1 million.

CORPORATE

The operating loss for Corporate increased to $23 million in the first quarter of 2017 compared with $21 million in the first quarter of 2016 primarily due to higher costs for services, including those in support of growth platforms.

Liquidity and Capital Resources

As of March 31, 2017, we had $434 million of cash and cash equivalents and marketable securities compared with $518 million as of December 31, 2016. See discussion below under Cash Flows for explanation of the change in cash and cash equivalents. Our total liquidity as of March 31, 2017 was $559 million (including $125 million of borrowing availability under our credit facility) compared to $603 million as of December 31, 2016 (including $85 million of borrowing availability under our credit facility). The decrease in liquidity reflected payments for our share repurchase program and for incentives.

We invest in cash equivalents and marketable securities pursuant to an investment policy that has preservation of principal as its primary objective. The policy includes provisions regarding diversification, credit quality and maturity profile that are designed to minimize the overall risk profile of our investment portfolio. The securities in the portfolio are subject to normal market fluctuations. See Note 5 to the condensed consolidated financial statements for additional information regarding our investments in marketable securities.

Total debt, consisting of senior notes and industrial revenue bonds, amounted to $1.084 billion ($1.089 billion in aggregate principal amount less $5 million of debt issuance costs) as of March 31, 2017 and $1.083 billion ($1.089 billion in aggregate principal amount less $6 million of debt issuance costs) as of December 31, 2016. During the three months ended March 31, 2017, there were no borrowings under our revolving credit facility and no borrowings outstanding at period end.

27

Our senior notes and industrial revenue bonds are rated by the three major credit-rating agencies: Moody’s Investors Service (Moody’s), Standard & Poor’s Global Ratings (S&P), and Fitch Ratings, Inc. (Fitch). The ratings are typically monitored by stockholders, creditors, or suppliers as an indicator of the company's viability. Additionally, the ratings of Moody’s and S&P impact the interest rate on our 7.75% senior notes maturing in 2018. See Note 6 to the condensed consolidated financial statements in our Annual Report on Form 10-K for additional information regarding the impact of changes to our credit ratings on interest rates. Below is a summary of the ratings published by the three agencies as of the date indicated:

	S&P	Moody's	Fitch
Corporate/Family rating	BB+	Ba2	BB+
Outlook	Stable	Positive	Stable
Guaranteed senior notes	BB+	Ba2	BB+
All other notes and bonds	BB+	Ba3	BB+
Report date	November 10, 2016	November 22, 2016	April 19, 2017

We maintain a credit facility with a maximum borrowing limit of $180 million (including a $50 million borrowing sublimit for CGC) that is available to fund working capital needs and other general corporate purposes and matures on October 22, 2019. The facility is guaranteed by certain of our significant subsidiaries and secured by such parties’ eligible trade receivables and inventory. The maximum borrowing limit under the credit agreement may be increased up to $650 million at our request and with our lenders’ approval. The credit agreement contains other covenants and events of default that are customary for similar agreements and may limit our ability to take various actions including our ability to pay a dividend or repurchase our stock.

Although the maximum borrowing limit under the credit agreement is $180 million, the credit agreement specifies the maximum principal that may be borrowed by USG and CGC is impacted by any amounts outstanding under the credit agreement, outstanding letters of credit, a borrowing base comprised of eligible trade receivables and inventory, and the minimum excess availability that may be required due to the Covenant Trigger Threshold, described below, being applicable. As of March 31, 2017, the maximum principal we could borrow after taking into account the foregoing factors was approximately $125 million.

The credit agreement contains a covenant that would require us to maintain a minimum fixed charge coverage ratio of not less than 1.0-to-1.0 in the event that excess availability falls below the "Covenant Trigger Threshold" equal to 10% of the lesser of (a) the aggregate revolving commitment and (b) the aggregate of the USG and CGC borrowing base. As of March 31, 2017, our fixed charge coverage ratio was 0.38-to-1.0 and; therefore, we are required to maintain minimum excess availability of no less than the Covenant Trigger Threshold so that the financial covenant will remain inapplicable. Currently, that amount would be approximately $18 million.

Our undistributed foreign earnings as of March 31, 2017 are considered permanently reinvested with the exception of earnings associated with the former holding company of the Knauf-USG joint venture that was sold in December 2015. The amount of cash and cash equivalents held by our foreign subsidiaries was $177 million as of March 31, 2017 and would be subject to material repatriation tax effects.

28

CASH FLOWS

The following table presents a summary of our cash flows:

	Three months ended March 31,
(millions)	2017			2016
Net cash provided by (used for):
Operating activities from continuing operations	$	(29	)	$	(46	)
Investing activities from continuing operations	(41		)	—
Financing activities from continuing operations	(25		)	(65		)
Discontinued operations	5			15
Effect of exchange rate changes on cash	4			1
Net decrease in cash and cash equivalents	$	(86	)	$	(95	)

Operating Activities: Net cash used for operating activities was lower for the first three months of 2017 compared to the first three months of 2016 due to lower payments to our pension and postretirement plans in the first quarter of 2017. We contributed $2 million and $61 million in the first three months of 2017 and 2016, respectively. Our net cash outflows were higher in 2017 compared to 2016, primarily because of an increase in accounts receivable of $23 million as a result of higher sales in the current quarter, an increase in inventories of $7 million due to increased costs for raw materials and a decrease in accrued expenses of $12 million due to higher incentive payments. These were offset by lower cash outflows for accounts payable of $11 million in 2017 as compared to 2016, which included an increase in capital expenditures that remained in accounts payable as of March 31, 2017.

As of March 31, 2017, working capital (current assets less current liabilities) amounted to $84 million, and the ratio of current assets to current liabilities was 1.10-to-1. As of December 31, 2016, working capital amounted to $527 million, and the ratio of current assets to current liabilities was 2.25-to-1. This decrease reflected the classification of $500 million of our 7.75% senior notes due 2018 as current as of March 31, 2017, which we intend to refinance to long-term in the near term.

Investing Activities: Net cash used for investing activities was $41 million for the first three months of 2017 compared to $0 million for the three months ended March 31, 2016. The net activity of purchases and sales or maturities of marketable securities was a cash outflow of $2 million for the three months ended March 31, 2017 as compared to a cash inflow of $5 million for the three months ended March 31, 2016.

The increase in capital expenditures to $39 million in the first three months of 2017 from $14 million in the first three months of 2016 reflected expenditures for the replacement, modernization and expansion of operations, including Advanced Manufacturing initiatives. Approved capital expenditures totaled $126 million as of March 31, 2017 compared with $121 million as of December 31, 2016.

Financing Activities: Net cash used for financing activities for the first three months of 2017 was $25 million compared to $65 million for the first three months of 2016. The cash used in 2017 reflected the repurchase of common stock under the approved stock repurchase program of $25 million. The cash used in 2016 reflected $64 million paid to repurchase $62 million of our 6.3% Notes in the open market.

Discontinued Operations: Net cash provided by discontinued operations for first three months of 2017 was $5 million compared to $15 million for the first three months of 2016. The cash inflow in 2017 reflected a working capital adjustment associated with the sale of L&W.

DEFINED BENEFIT PLANS

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 and postretirement plans in 2017 of approximately $74 million.

LIQUIDITY OUTLOOK

In the first three months of 2017, our investing cash outflows included $39 million of capital expenditures. In total for 2017, we plan to spend approximately $200 million on capital expenditures in the normal course of business, which includes up to $80 million allocated for Advanced Manufacturing projects to standardize and automate production across our Gypsum and Ceilings businesses. We expect to fund these expenditures with cash from operations or cash on hand.

29

Interest payments, based on our current level of outstanding debt, are expected to remain at approximately $77 million in 2017 compared with $153 million in 2016 which reflects lower debt levels due to the repayment of $1.1 billion in debt in 2016. We intend to refinance our 7.75% senior notes due 2018, as well as our credit facility, in the near term.

On January 31, 2017, our Board of Directors approved a share repurchase program in which we may repurchase up to $250 million of our common stock. As of March 31, 2017, we purchased $25 million in shares under the program, and to date we have purchased $47 million in shares under the program, with $203 million remaining. The timing and the amount of any repurchases will be determined based on market conditions and other factors. Share repurchases will be funded with available cash on hand. See Part II, Item 2 for additional information.

Since formation, UBBP was funded from its net cash flow from operations and third-party financing, and it is our intent that as an ongoing operation, UBBP will continue to self-fund. UBBP is targeting the distribution of 50% of combined after tax profits to USG and Boral; however, this dividend may be adjusted by the UBBP Board with unanimous resolution.

In the event certain performance targets are satisfied by UBBP, we will be obligated to pay Boral an earnout payment in an amount up to $50 million in 2019, based on UBBP performance during the first five years. 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. 

We believe that cash on hand, cash equivalents, marketable securities, cash available from future operations and our credit facility will provide sufficient liquidity to fund our operations for at least the next 12 months. Cash requirements include, among other things, capital expenditures, working capital needs, employee retirement plans funding, interest payments and other contractual obligations.

Recently Issued Accounting Pronouncements

See Part 1, Item 1, Note 1 to the condensed consolidated financial statements for information related to new accounting standards.

Legal Contingencies

We are named as defendants in litigation arising from our operations, including lawsuits or claims arising from commercial disputes, product performance or warranties, products liability, and worksite or vehicular accidents.

In 2015, USG, United States Gypsum Company, L&W Supply Corporation, and seven other wallboard manufacturers were named as defendants in a lawsuit filed by twelve homebuilders alleging that the defendants conspired to fix the price of wallboard sold in the United States. Earlier, in 2013, class action lawsuits making similar allegations were filed in Canada on behalf of a class of purchasers of wallboard in Canada. 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.

In the third quarter of 2015 United States Gypsum Company was served with a federal grand jury subpoena requesting the production of company records in connection with a federal investigation of the gypsum drywall industry. Two former employees of USG have also been served with subpoenas. We believe the investigation, although a separate proceeding, is related to the same events at issue in the litigation discussed above. We are fully cooperating with the grand jury investigation. We believe we acted in full compliance with the law, and we do not expect the resolution of this matter to result in any material effect on our business, financial position, liquidity or results of operations; however, we can provide no assurances as to the scope, timing, or outcome of any such investigation. 

See Note 14 to the condensed consolidated financial statements for further information regarding the foregoing lawsuits and other legal matters.

Critical Accounting Policies

The preparation of our financial statements requires us to make estimates, judgments and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses during the periods presented. Our Annual Report on Form 10-K for the fiscal year ended December 31, 2016, which we filed with the Securities and Exchange Commission on February 8, 2017, includes a summary of the critical accounting policies we believe are the most important to aid in understanding our financial results. There have been no changes to those critical accounting policies that have had a material impact on our reported amounts of assets, liabilities, revenues or expenses during the first three months of 2017.

30

Forward-Looking Statements

This report contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 related to management’s expectations about future conditions. Any forward-looking statements represent our views only as of the date of this report and should not be relied upon as representing our views as of any subsequent date, and we undertake no obligation to update any forward-looking statement. Forward-looking statements include, but are not limited to, statements under the following headings: (1) “Management’s Discussion and Analysis” about (a) market conditions and outlook, including anticipated growth in new residential and nonresidential construction, repair and remodel spending, and the construction industries in Canada and Mexico, and the anticipated growth or decline in countries in the UBBP territory and its effect on the cyclicality of our North American business, industry shipments of gypsum, demand for gypsum wallboard and industry capacity utilization rate, and our selling prices and margins; (b) expected contributions to our pension and postretirement plans; (c) our liquidity outlook, including our capital expenditure plans, expected interest payments, intended debt refinancings, share repurchase program, UBBP’s dividend policy and ability to self-fund, and cash requirements and adequacy of resources to fund them; and (d) the outcome and effect of ongoing and future legal and governmental proceedings; and (2) “Legal Proceedings” about the outcome and effect of ongoing and future legal and governmental proceedings.

Some of the risk factors that affect our business and financial results are discussed under “Risk Factors” in our most recent Annual Report on Form 10-K. We wish to caution the reader that actual business, market or other conditions, including the “Risk Factors” discussed in our most recent Annual Report on Form 10-K or in our other Securities and Exchange Commission filings, could cause our actual results to differ materially from those stated in the forward-looking statements.

ITEM 3.QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

There have been no significant changes to our market risk since December 31, 2016.     

ITEM 4. CONTROLS AND PROCEDURES

(a) Evaluation of disclosure controls and procedures.

Our Chief Executive Officer and Chief Financial Officer, after evaluating the effectiveness of our “disclosure controls and procedures” (as defined in Rule 13a-15(e) promulgated under the Securities Exchange Act of 1934, or the Act), have concluded that, as of the end of the quarter covered by this report, our disclosure controls and procedures were effective to provide reasonable assurance that information required to be disclosed by us in the reports that we file or submit under the Act is recorded, processed, summarized and reported within the time periods specified in the Securities and Exchange Commission’s rules and forms. Disclosure controls and procedures include, without limitation, controls and procedures designed to ensure that information required to be disclosed by an issuer in the reports that it files or submits under the Act is accumulated and communicated to the issuer’s management, including its principal executive and financial officers, or persons performing similar functions, as appropriate to allow timely decisions regarding required disclosure.

(b) Changes in internal control over financial reporting.

There were no changes in our “internal control over financial reporting” (as defined in Rule 13a-15(f) promulgated under the Act) identified in connection with the evaluation required by Rule 13a-15(d) promulgated under the Act that occurred during the fiscal quarter ended March 31, 2017 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

31

PART II. OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

See Part I, Item 1, Note 14 to the condensed consolidated financial statements and Part I, Item 2, Legal Contingencies for additional information regarding legal proceedings.

ITEM 1A. RISK FACTORS

There is no material change in the information reported under "Part I-Item 1A-Risk Factors" contained in our Annual Report on Form 10-K for the fiscal year ended December 31, 2016.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

(a) Pursuant to our Deferred Compensation Program for Non-Employee Directors, one of our non-employee directors deferred a portion of his quarterly retainer for service as a director that was payable on March 31, 2017 into a total of approximately 675 deferred stock units. These units will increase or decrease in value in direct proportion to the market value of our common stock and will be paid in cash or shares of common stock, at the director’s option, following termination of service as a director. The issuance of these deferred stock units was effected through a private placement under Section 4(2) of the Securities Act of 1933, as amended, and was exempt from registration under Section 5 of that Act.

(b) Not applicable

(c) On February 1, 2017, we announced that our Board of Directors approved a $250 million share repurchase program. Under the program, we may repurchase shares from time to time in open market transactions or in privately-negotiated transactions in accordance with applicable securities laws. We may discontinue the program at any time and the program has no set expiration date. The timing and amount of any repurchase of shares is determined by our management, based on its evaluation of market conditions, cash on hand, applicable legal requirements and other factors. Under the repurchase program, shares may be repurchased from time to time in privately negotiated or open market transactions, including under plans complying with Rule 10b5-1 of the Exchange Act. The following table provides information about purchases we made during the three months ended March 31, 2017 of our common stock:

Issuer Purchases of Equity Securities
Period	Total number of shares purchased	Average price paid per share		Total number of shares repurchased as part of publicly announced plans or programs	Approximate dollar value of shares that may yet be purchased under the plans or programs (millions)
January 1, 2017 to January 31, 2017	—	$	—	—	$	250
February 1, 2017 to February 28, 2017	162,301	$	32.27	162,301	$	245
March 1, 2017 to March 31, 2017	601,632	$	33.43	601,632	$	225
Total	763,933			763,933

ITEM 4. MINE SAFETY DISCLOSURES

The information concerning mine safety violations or regulatory matters required by Section 1503(a) of the Dodd-Frank Wall Street Reform and Consumer Protection Act and Item 104 of Regulation S-K promulgated by the SEC is included in Exhibit 95 to this report.

ITEM 6. EXHIBITS

The information in the Exhibit Index of this Quarterly Report on Form 10-Q is incorporated into this Item 6 by reference.

32

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized.

	USG CORPORATION
	By	/s/ Jennifer F. Scanlon
		Jennifer F. Scanlon,
		Director, President and Chief Executive Officer
	By	/s/ Matthew F. Hilzinger
		Matthew F. Hilzinger,
		Executive Vice President and Chief Financial Officer
	By	/s/ Jeanette A. Press
		Jeanette A. Press,
		Vice President, Controller and Principal Accounting Officer
April 27, 2017

33

EXHIBIT INDEX

Exhibit Number	Exhibit
31.1	Rule 13a-14(a) Certifications of USG Corporation’s Chief Executive Officer *
31.2	Rule 13a-14(a) Certifications of USG Corporation’s Chief Financial Officer *
32.1	Section 1350 Certifications of USG Corporation’s Chief Executive Officer *
32.2	Section 1350 Certifications of USG Corporation’s Chief Financial Officer *
95	Mine Safety Disclosures *
101	The following financial information from USG Corporation’s Quarterly Report on Form 10-Q for the three months ended March 31, 2017, formatted in XBRL (Extensible Business Reporting Language): (1) the condensed consolidated statements of income for the three months ended March 31, 2017 and 2016, (2) the condensed consolidated statements of comprehensive income (loss) for the three months ended March 31, 2017 and 2016, (3) the condensed consolidated balance sheets as of March 31, 2017 and December 31, 2016, (4) the condensed consolidated statements of cash flows for the three months ended March 31, 2017 and 2016 and (5) notes to the condensed consolidated financial statements. *

* Filed or furnished herewith

EX-31.1

EXHIBIT 31.1

CERTIFICATIONS

I, Jennifer F. Scanlon, certify that:

1. I have reviewed this quarterly report on Form 10-Q of USG Corporation (the “Corporation”);

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the Corporation as of, and for, the periods presented in this report;

4. The Corporation’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act rules 13a-15(f) and 15(d)-15(f)) for the Corporation and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the Corporation, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the Corporation’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the Corporation’s internal control over financial reporting that occurred during the Corporation’s most recent fiscal quarter (the Corporation’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the Corporation’s internal control over financial reporting; and

5. The Corporation’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the Corporation’s auditors and the audit committee of the Corporation’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the Corporation’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the Corporation’s internal control over financial reporting.

April 27, 2017	/s/ Jennifer F. Scanlon
	Jennifer F. Scanlon
	President and Chief Executive Officer

EX-31.2

EXHIBIT 31.2

CERTIFICATIONS

I, Matthew F. Hilzinger, certify that:

1. I have reviewed this quarterly report on Form 10-Q of USG Corporation (the “Corporation”);

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the Corporation as of, and for, the periods presented in this report;

4. The Corporation’s other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act rules 13a-15(f) and 15(d)-15(f)) for the Corporation and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the Corporation, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the Corporation’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the Corporation’s internal control over financial reporting that occurred during the Corporation’s most recent fiscal quarter (the Corporation’s fourth fiscal quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the Corporation’s internal control over financial reporting; and

5. The Corporation’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the Corporation’s auditors and the audit committee of the Corporation’s board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the Corporation’s ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the Corporation’s internal control over financial reporting.

April 27, 2017	/s/ Matthew F. Hilzinger
	Matthew F. Hilzinger
	Executive Vice President and Chief Financial Officer

EX-32.1

EXHIBIT 32.1

SECTION 1350 CERTIFICATIONS

In connection with the Quarterly Report of USG Corporation (the “Corporation”) on Form 10-Q, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Jennifer F. Scanlon, President and Chief Executive Officer of the Corporation, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to the best of my knowledge:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Corporation.

April 27, 2017	/s/ Jennifer F. Scanlon
	Jennifer F. Scanlon
	President and Chief Executive Officer

EX-32.2

EXHIBIT 32.2

SECTION 1350 CERTIFICATIONS

In connection with the Quarterly Report of USG Corporation (the “Corporation”) on Form 10-Q, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Matthew F. Hilzinger, Executive Vice President and Chief Financial Officer of the Corporation, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to the best of my knowledge:

(1) The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Corporation.

April 27, 2017	/s/ Matthew F. Hilzinger
	Matthew F. Hilzinger
	Executive Vice President and Chief Financial Officer

EX-95

EXHIBIT 95

Mine Safety Disclosures

The operation of our ten mines and quarries in the United States is subject to regulation and inspection under the Federal Mine Safety and Health Act of 1977, or Safety Act. From time to time, inspection of our mines and quarries and their operation results in our receipt of citations or orders alleging violations of health or safety standards or other violations under the Safety Act. We are usually able to resolve the matters identified in the citations or orders with little or no assessments or penalties.

Section 1503(a) of the Dodd-Frank Wall Street Reform and Consumer Protection Act and rules promulgated by the Securities and Exchange Commission, or SEC, to implement that Section require that we disclose specified information about mine health and safety in our periodic reports filed with the SEC. The disclosure requirements set forth in Section 1503 and the SEC rules refer to, and are based on, the safety and health requirements applicable to mines under the Safety Act which is administered by the U.S. Labor Department's Mine Safety and Health Administration, or MSHA. Under the Safety Act, MSHA is required to inspect surface mines at least twice a year and underground mines at least four times a year to determine whether there is compliance with health and safety standards or with any citation, order or decision issued under the Safety Act and whether an imminent danger exists. MSHA also conducts spot inspections and inspections pursuant to miners' complaints.

If violations of safety or health standards are found, MSHA inspectors will issue citations to the mine operators. Among other activities under the Safety Act, MSHA also assesses and collects civil monetary penalties for violations of mine safety and health standards.

In addition, an independent adjudicative agency, the Federal Mine Safety and Health Review Commission, or FMSHRC, provides administrative trial and appellate review of legal disputes arising under the Safety Act. Most cases deal with civil penalties proposed by MSHA to be assessed against mine operators and address whether the alleged safety and health violations occurred, as well as the appropriateness of proposed penalties.

During the quarter ended March 31, 2017, we received 6 citations alleging health and safety violations that could significantly and substantially contribute to the cause and effect of a mine safety or health hazard under the Safety Act, or S&S violations, and 14 citations alleging other health and safety violations. We have received proposed assessments from MSHA with respect to 16 of the 20 citations. The total dollar value of the proposed assessments from MSHA with respect to those citations was $6,882. We have resolved 9 of the proposed assessments through payments of penalties aggregating $2,829. No other proposed assessments are being contested or otherwise remain outstanding. No assessments have yet been made by MSHA with respect to the other 4 citations. Set forth below is information with respect to the gypsum mines for which citations were received during the quarter ended March 31, 2017:

Location of Mines/Quarries	Number of Citations for S&S Violations	Number of Citations for Non S&S Violations	Total Proposed Assessments
Alabaster, Michigan	—	—	—
Empire, Nevada	—	—	—
Fort Dodge, Iowa	—	—	—
Plaster City, California	—	—	—
Shoals, Indiana	—	1	$116
Sigurd, Utah	—	2	232
Southard, Oklahoma	—	2	232
Sperry, Iowa	3	7	6,022
Spruce Pine, North Carolina	—	—	—
Sweetwater, Texas	3	2	280
Totals	6	14	$6,882

We did not receive any citations or orders for unwarrantable failure to comply with mandatory health and safety standards under the Safety Act, any orders under the Safety Act regarding withdrawal from a mine as a result of failure to abate in a timely manner a health and safety violation for which a citation was issued, any imminent danger orders under the Safety Act, any written notice from MSHA of a pattern of violations of mandatory health or safety standards that are of such a nature as could significantly and substantially contribute to the cause and effect of mine health and safety hazards under the Safety Act or any written notice from MSHA of the potential to have such a pattern during the quarter ended March 31, 2017. Also, there were no flagrant violations under the Safety Act and no mining-related fatalities during the quarter ended March 31, 2017, and no legal actions before the FMSHRC were instituted during the quarter ended March 31, 2017 or pending as of March 31, 2017.

XML

Document and Entity Information	3 Months Ended
	Mar. 31, 2017 shares
Document and Entity Information [Abstract]
Entity Registrant Name	USG CORP
Entity Central Index Key	0000757011
Document Type	10-Q
Document Period End Date	Mar. 31, 2017
Amendment Flag	false
Document Fiscal Year Focus	2017
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

XML

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)	0.00	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)	0.00	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

XML

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

XML

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

XML

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

XML

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

XML

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

XML

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 endedMarch 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.

XML

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 endedMarch 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 endedMarch 31, 2017 related to payments on trade receivables.

XML

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.

XML

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

XML

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.

XML

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, 2017		December 31, 2016
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, 2017		December 31, 2016
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.

XML

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.

XML

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		)

XML

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.

XML

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

XML

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

XML

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 endedMarch 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.

XML

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.

XML

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.

XML

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.

XML

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

XML

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

XML

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

XML

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

XML

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

XML

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, 2017		December 31, 2016
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, 2017		December 31, 2016
Fair value of debt	$	1,128	$	1,129
Accrued interest	14		31

XML

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

XML

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		)

XML

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.

XML

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

XML

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

XML

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 endedMarch 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	$	—	$	—

XML

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

XML

Discontinued Operations (Details) $ in Millions	3 Months Ended
	Mar. 31, 2016 USD ($)
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

XML

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

XML

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%

XML

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

XML

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

XML

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

XML

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)

XML

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

XML

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

XML

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

XML

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

XML

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)

XML

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

XML

Derivative Instruments (Details Textual) MMBTU in Millions		3 Months Ended
		Mar. 31, 2017 USD ($) MMBTU	Mar. 31, 2016 USD ($)
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

XML

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

XML

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.

XML

Employee Retirement Plans (Details Textual) $ in Millions	3 Months Ended
	Mar. 31, 2017 USD ($)
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

XML

Share-Based Compensation (Details) $ / shares in Units, shares in Thousands	3 Months Ended
	Mar. 31, 2017 USD ($) $ / shares shares
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.

XML

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	1.0	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	0.2

XML

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%

XML

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

XML

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

XML

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

XML

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)

XML

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

XML

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

XML

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

XML

Litigation (Details Textual) $ in Millions	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Mar. 31, 2015 Homebuilder
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

XML

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