Unrecognized Tax Benefits and Related Accrued Estimated Interest and Penalties (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012
Income Taxes [Line Items]
Balance at December 31, 2011, Unrecognized Tax Benefits			$ (857)
Activity for three months March, June and September, Unrecognized Tax Benefits	2	(5)	(119)	[1]
Balance at Sept 30, 2012, Unrecognized Tax Benefits	(979)
Balance at December 31, 2011, Accrued Estimated Interest and Tax Penalties			(88)
Activity for three months ended March, June and September, Accrued Estimated Interest and Tax Penalties	1	0	(10)
Balance at Sept 30, 2012, Accrued Estimated Interest and Tax Penalties	$ (97)

[1] is activity primarily relates to the unrecognized tax benefits and related accrued interest and penalties assumed as part of the acquisition of Temple-Inland.