BUSINESS SEGMENTS (Detail) (USD $) In Millions	3 Months Ended	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales to and revenues from unaffiliated customers	$ 1,652	$ 1,664	$ 5,003	$ 4,888
Less sales of discontinued operations	(83)	(150)	(402)	(450)
Sales to and revenues from unaffiliated customers of continuing operations	1,569	1,514	4,601	4,438
Intersegment sales	179	170	557	509
Total sales and revenues	1,748	1,684	5,158	4,947
Total	1,569	1,514	4,601	4,438
Net Contribution To Earnings	152	186	518	486
Interest expense, net of capitalized interest	(86)	(95)	(296)	(356)
Income before income taxes (continuing and discontinued operations)	66	91	222	130
Income taxes (continuing and discontinued operations)	91	1,025	44	980
Net earnings attributable to Weyerhaeuser common shareholders	157	1,116	266	1,110
Segment, Continuing Operations
Segment Reporting, Revenue Reconciling Item [Line Items]
Net Contribution To Earnings	115	179	498	471
Segment, Continuing Operations \| Timberlands
Segment Reporting, Revenue Reconciling Item [Line Items]
Net Contribution To Earnings	62	75	415	226
Segment, Continuing Operations \| Wood Products
Segment Reporting, Revenue Reconciling Item [Line Items]
Net Contribution To Earnings	(76)	(102)	(165)	(135)
Segment, Continuing Operations \| Cellulose Fibers
Segment Reporting, Revenue Reconciling Item [Line Items]
Net Contribution To Earnings	135	181	301	274
Segment, Continuing Operations \| Real Estate
Segment Reporting, Revenue Reconciling Item [Line Items]
Net Contribution To Earnings	10	20	17	78
Segment, Continuing Operations \| Corporate and Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Net Contribution To Earnings	(16)	5	(70)	28
Segment, Discontinued Operations
Segment Reporting, Revenue Reconciling Item [Line Items]
Net Contribution To Earnings	37	7	20	15
Timberlands
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales to and revenues from unaffiliated customers	252	240	770	667
Intersegment sales	154	145	479	439
Wood Products
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales to and revenues from unaffiliated customers	630	626	1,956	2,019
Intersegment sales	21	20	66	56
Cellulose Fibers
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales to and revenues from unaffiliated customers	503	522	1,535	1,400
Real Estate
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales to and revenues from unaffiliated customers	211	210	562	618
Corporate and Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales to and revenues from unaffiliated customers	56	66	180	184
Intersegment sales	4	5	12	14
Intersegment eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Intersegment sales	$ (179)	$ (170)	$ (557)	$ (509)

Amount of sales or other form of revenues attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period.

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