LONGVIEW TIMBER PURCHASE - Summarized unaudited pro forma information (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012
Business Acquisition [Line Items]
Net sales	$ 7,371	$ 6,166
Net earnings from continuing operations attributable to Weyerhaeuser common shareholders	$ 485	$ 276
Net earnings from continuing operations per share attributable to Weyerhaeuser common shareholders, basic	$ 0.84	$ 0.48
Net earnings from continuing operations per share attributable to Weyerhaeuser common shareholders, diluted	$ 0.83	$ 0.47

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The pro forma income from continuing operations before changes in accounting and extraordinary items, net of tax effect per basic share of common stock for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (h)(2)-(3)

-URI http://asc.fasb.org/extlink&oid=25497992&loc=d3e1392-128463

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- Definition

The pro forma income from continuing operations before changes in accounting and extraordinary items, net of tax effect, per diluted share of common stock for a period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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The pro forma income from continuing operations before changes in accounting and extraordinary items, net of tax effect, for the period as if the business combination or combinations had been completed at the beginning of a period.

+ References

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The pro forma revenue for a period as if the business combination or combinations had been completed at the beginning of the period.

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