NET EARNINGS PER SHARE - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014	Aug. 13, 2014
Basic earnings per share attributable to Weyerhaeuser common shareholders	$ 0.26	$ 0.48	$ 0.43	$ 0.79
Diluted earnings per share attributable to Weyerhaeuser common shareholders	$ 0.26	$ 0.47	$ 0.43	$ 0.79
Common shares, outstanding	514,121,330		514,121,330		524,474,315
Stock repurchase program 2014
Stock repurchase program, shares repurchased	4,842,517		12,184,083
Stock repurchase program, shares repurchased value	$ 154,000,000		$ 407,000,000
Stock repurchase program, authorized repurchase amount						$ 700,000,000
Stock repurchase program, remaining authorized repurchase amount	$ 90,000,000		$ 90,000,000
Stock repurchase program, number of shares repurchased under authorization	18,247,076		18,247,076
Stock repurchase program, amount of repurchases made under authorization	$ 610,000,000		$ 610,000,000