Unrecognized Tax Benefits and Related Accrued Estimated Interest and Penalties (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2012		Jun. 30, 2012
Income Taxes [Line Items]
Balance at December 31, 2011, Unrecognized Tax Benefits	$ (857)		$ (857)
Activity for three months ended March 31, 2012, Unrecognized Tax Benefits	(119)	[1]	(5)
Activity for three months ended June 30, 2012, Unrecognized Tax Benefits	(119)	[1]	(5)
Balance at June 30, 2012, Unrecognized Tax Benefits			(981)
Balance at December 31, 2011, Accrued Estimated Interest and Tax Penalties	(88)		(88)
Activity for three months ended March 31, 2012, Accrued Estimated Interest and Tax Penalties	(10)		0
Activity for three months ended June 30, 2012, Accrued Estimated Interest and Tax Penalties	(10)		0
Balance at June 30, 2012, Accrued Estimated Interest and Tax Penalties			$ (98)

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