SELECTED QUARTERLY FINANCIAL INFORMATION - Key Quarterly Financial Data for the Last Two Years (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Net sales	$ 2,256	$ 2,181	$ 2,141	$ 1,951	$ 2,000	$ 1,772	$ 1,793	$ 1,494	$ 8,529	$ 7,059	$ 6,216
Operating income (loss)	(97)	277	311	256	256	202	176	101	747	735	594
Earnings (loss) from continuing operations before income taxes	(194)	203	240	185	182	130	101	26	434	439	257
Net earnings	54	167	198	144	142	117	84	41	563	384	331
Net earnings attributable to Weyerhaeuser common shareholders	43	157	196	144	143	117	84	41	540	385	331
Basic net earnings per share attributable to Weyerhaeuser common shareholders	$ 0.07	$ 0.27	$ 0.35	$ 0.26	$ 0.26	$ 0.22	$ 0.16	$ 0.08	$ 0.95	$ 0.71	$ 0.62
Diluted net earnings per share attributable to Weyerhaeuser common shareholders	$ 0.07	$ 0.27	$ 0.35	$ 0.26	$ 0.26	$ 0.22	$ 0.16	$ 0.08	$ 0.95	$ 0.71	$ 0.61
Dividends paid per share	$ 0.22	$ 0.22	$ 0.20	$ 0.17	$ 0.17	$ 0.15	$ 0.15	$ 0.15	$ 0.81	$ 0.62	$ 0.60
Non-cash impairment charge									357	1	10
Maximum
Market prices - high/low	$ 32.00	$ 29.86	$ 33.24	$ 31.74	$ 28.82	$ 28.06	$ 22.36	$ 22.36	$ 33.24	$ 28.82
Minimum
Market prices - high/low	$ 28.01	$ 26.64	$ 26.38	$ 28.36	$ 24.75	$ 21.87	$ 18.60	$ 18.50	$ 15.25	$ 18.50
Large master-planned community located north of Las Vegas, Nevada | Fair Value, Inputs, Level 2 and 3
Non-cash impairment charge	$ 356