COMPREHENSIVE INCOME (LOSS) - Items Included in Comprehensive Income (Loss) (Detail) (USD $) In Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Accumulated Other Comprehensive Income (Loss) [Line Items]
Consolidated net earnings	$ 157	$ 1,116	$ 266	$ 1,112
Other comprehensive income (loss):
Foreign currency translation adjustments	(40)	19	(18)	17
Actuarial gains (losses), net of tax	48	(83)	158	0
Prior service credits (costs), net of tax	(1)	13	(4)	4
Total other comprehensive income (loss)	7	(51)	136	21
Total comprehensive income	164	1,065	402	1,133
Less: comprehensive income attributable to noncontrolling interests	0	0	0	(2)
Comprehensive income attributable to Weyerhaeuser common shareholders	$ 164	$ 1,065	$ 402	$ 1,131