Supplemental Balance Sheet Information

9 Months Ended

Sep. 30, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Supplemental Balance Sheet Information

Supplemental Balance Sheet Information

INVENTORIES

Total inventories consisted of the following:

(millions)	September 30, 2018		December 31, 2017
Finished goods	$	167	$	140
Work in progress	43		39
Raw materials	78		73
Total	$	288	$	252

ACCRUED EXPENSES

Accrued expenses consisted of the following:

(millions)	September 30, 2018		December 31, 2017
Self-insurance reserves	$	14	$	12
Employee compensation	13		17
Interest	13		12
Derivatives	5		9
Pension and other postretirement benefits	17		17
Environmental	12		17
Other	58		51
Total	$	132	$	135

ASSET RETIREMENT OBLIGATIONS

Changes in the liability for asset retirement obligations, which are included in "Other liabilities" on our condensed consolidated balance sheets, consisted of the following:

	Nine months ended September 30,
(millions)	2018			2017
Balance as of January 1	$	118		$	113
Accretion expense	5			5
Liabilities incurred	—			3
Changes in estimated cash flows	(5		)	(4		)
Liabilities settled	(1		)	(1		)
Foreign currency translation	—			2
Balance as of September 30	$	117		$	118

ASSET DISPOSITIONS

In the second quarter of 2018, we recorded a gain of $13 million, or $9 million net of tax, on the sale of a surplus property. The pre-tax gain was recorded in cost of products sold within the U.S. Wallboard and Surfaces segment.