BUSINESS SEGMENTS - Reconciliation from Segment Totals to Consolidated (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales to and revenues from unaffiliated customers	$ 1,793	$ 1,610	$ 3,287	$ 3,032
Intersegment sales	166	155	376	366
Total sales and revenues	1,959	1,765	3,663	3,398
Total	1,793	1,610	3,287	3,032
Net contribution to earnings	187	117	300	366
Interest expense, net of capitalized interest	(86)	(117)	(173)	(210)
Income before income taxes (continuing and discontinued operations)	101	0	127	156
Income taxes (continuing and discontinued operations)	(17)	10	(2)	(47)
Net earnings attributable to Weyerhaeuser common shareholders	84	10	125	109
Timberlands
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales to and revenues from unaffiliated customers	262	288	512	518
Intersegment sales	146	134	336	325
Wood Products
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales to and revenues from unaffiliated customers	776	605	1,410	1,131
Intersegment sales	20	21	40	41
Cellulose Fibers
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales to and revenues from unaffiliated customers	459	526	932	1,032
Real Estate
Segment Reporting, Revenue Reconciling Item [Line Items]
Sales to and revenues from unaffiliated customers	296	191	433	351
Intersegment eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Intersegment sales	(166)	(155)	(376)	(366)
Segment, Continuing Operations
Segment Reporting, Revenue Reconciling Item [Line Items]
Net contribution to earnings	164	157	261	457
Segment, Continuing Operations \| Timberlands
Segment Reporting, Revenue Reconciling Item [Line Items]
Net contribution to earnings	77	118	147	359
Segment, Continuing Operations \| Wood Products
Segment Reporting, Revenue Reconciling Item [Line Items]
Net contribution to earnings	36	(54)	23	(86)
Segment, Continuing Operations \| Cellulose Fibers
Segment Reporting, Revenue Reconciling Item [Line Items]
Net contribution to earnings	36	85	84	177
Segment, Continuing Operations \| Real Estate
Segment Reporting, Revenue Reconciling Item [Line Items]
Net contribution to earnings	15	8	7	7
Unallocated items
Segment Reporting, Revenue Reconciling Item [Line Items]
Net contribution to earnings	23	(21)	39	(74)
Segment, Discontinued Operations
Segment Reporting, Revenue Reconciling Item [Line Items]
Net contribution to earnings	$ 0	$ (19)	$ 0	$ (17)

The sum of current income tax expense or benefit and deferred income tax expense or benefit pertaining to continuing operations, tax effect allocated to a disposal group that is classified as a component of the entity reported as a separate component of income before extraordinary items, and tax effect of gains and losses from events or transactions meeting the criteria to be classified as an extraordinary item.

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Amount of revenue from external customers for the reportable segment. Such disclosure is presented if the amount is: (a) included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss.

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Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

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Amount of total revenue for the reportable segments, including revenue from external customers, transactions with other operating segments of the same entity, and (gross) interest revenue. All considered to be "operating revenue" for purposes of the taxonomy.

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