BUSINESS SEGMENTS (Detail) (USD $) In Millions	3 Months Ended	6 Months Ended
Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales to and revenues from unaffiliated customers	$ 1,773	$ 1,805	$ 3,351	$ 3,224
Less sales of discontinued operations	(163)	(164)	(319)	(300)
Sales to and revenues from unaffiliated customers of continuing operations	1,610	1,641	3,032	2,924
Intersegment sales	163	148	378	339
Total sales and revenues	1,773	1,789	3,410	3,263
Intersegment eliminations	(163)	(148)	(378)	(339)
Total	1,610	1,641	3,032	2,924
Net contribution to earnings	117	176	366	300
Interest expense, net of capitalized interest	(117)	(155)	(210)	(261)
Income before income taxes (continuing and discontinued operations)	0	21	156	39
Income taxes (continuing and discontinued operations)	10	(7)	(47)	(45)
Net earnings (loss) attributable to Weyerhaeuser common shareholders	10	14	109	(6)
Timberlands
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales to and revenues from unaffiliated customers	288	225	518	427
Intersegment sales	134	123	325	294
Net contribution to earnings	112	70	353	151
Wood Products
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales to and revenues from unaffiliated customers	702	789	1,326	1,393
Intersegment sales	24	20	45	36
Net contribution to earnings	(61)	(3)	(97)	(22)
Cellulose Fibers
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales to and revenues from unaffiliated customers	526	468	1,032	878
Net contribution to earnings	80	74	166	93
Real Estate
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales to and revenues from unaffiliated customers	191	257	351	408
Net contribution to earnings	8	27	7	58
Corporate and Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales to and revenues from unaffiliated customers	66	66	124	118
Intersegment sales	5	5	8	9
Net contribution to earnings	$ (22)	$ 8	$ (63)	$ 20

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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