Income Taxes (Components Of Net Income Tax Provisions Related To Special Items And Discontinued Operations) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Income Taxes [Abstract]
Restructuring and other charges	$ (28)	$ 5
Temple-Inland acquisition	3	0
Expired tax contingency reserves	0	(15)
Income tax provision (benefit) related to special items and discontinued operations	$ (25)	$ (10)