Supplemental Balance Sheet Information

6 Months Ended

Jun. 30, 2011

Supplemental Balance Sheet Information [Abstract]

Supplemental Balance Sheet Information

13. Supplemental Balance Sheet Information

INVENTORIES

Total inventories consisted of the following:

	As of		As of
	June 30,		December 31,
(millions)	2011		2010
Finished goods and work in progress	$	250	$	227
Raw materials		63		63
Total	$	313	$	290

ASSET RETIREMENT OBLIGATIONS

Changes in the liability for asset retirement obligations consisted of the following:

	Six Months
	ended June 30,
(millions)	2011		2010
Balance as of January 1	$	103	$	101
Accretion expense		2		2
Foreign currency translation		1		—
Balance as of June 30	$	106	$	103

PROPERTY, PLANT AND EQUIPMENT

As of June 30, 2011, we had $8 million of net property, plant and equipment included in other current assets on the condensed consolidated balance sheet classified as “assets held for sale.” These assets are primarily owned by United States Gypsum Company. Assets held for sale as of December 31, 2010 amounted to $7 million.