BUSINESS SEGMENTS - Reconciliation from Segment Totals to Consolidated (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	$ 1,915	$ 1,857	$ 5,615	$ 5,486
Net contribution to earnings	1,297	298	2,070	886
Interest expense, net of capitalized interest (continuing and discontinued operations)	(89)	(95)	(257)	(258)
Income before income taxes (continuing and discontinued operations)	1,208	203	1,813	628
Income taxes (continuing and discontinued operations)	(44)	(36)	(164)	(119)
Net earnings	1,164	167	1,649	509
Dividends on preference shares	(11)	(10)	(33)	(12)
Net earnings attributable to Weyerhaeuser common shareholders	1,153	157	1,616	497
Continuing operations
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	1,915	1,857	5,615	5,486
Discontinued operations
Segment Reporting, Revenue Reconciling Item [Line Items]
Net contribution to earnings	972	34	1,017	58
Operating segments \| Continuing operations
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	2,153	2,070	6,317	6,125
Net contribution to earnings	300	244	945	864
Operating segments \| Timberlands \| Continuing operations
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	364	353	1,138	979
Net contribution to earnings	136	118	470	336
Operating segments \| Wood Products \| Continuing operations
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	1,048	1,030	3,023	3,083
Net contribution to earnings	105	79	271	393
Operating segments \| Cellulose Fibers \| Continuing operations
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	503	474	1,454	1,424
Net contribution to earnings	59	47	204	135
Operating intersegments \| Continuing operations
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	238	213	702	639
Operating intersegments \| Timberlands \| Continuing operations
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	218	194	642	584
Operating intersegments \| Wood Products \| Continuing operations
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	20	19	60	55
Intersegment eliminations \| Continuing operations
Segment Reporting, Revenue Reconciling Item [Line Items]
Net sales	(238)	(213)	(702)	(639)
Unallocated Items \| Continuing operations
Segment Reporting, Revenue Reconciling Item [Line Items]
Net contribution to earnings	$ 25	$ 20	$ 108	$ (36)

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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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).

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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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