NET EARNINGS PER SHARE - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended
	Apr. 30, 2016	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Basic and diluted earnings per share attributable to Weyerhaeuser common shareholders		$ 0.11	$ 0.17
Stock repurchase program, shares repurchased		31,367,541
Stock repurchase program, shares repurchased value		$ 863
Stock repurchase program, authorized repurchase amount				$ 2,500
Stock repurchase program, remaining authorized repurchase amount		$ 1,638
Unsettled Share Repurchases [Member]
Stock repurchase program, shares repurchased		2,128,645
Stock repurchase program, shares repurchased value		$ 66
Subsequent Event
Stock repurchase program, shares repurchased	12,288,096
Stock repurchase program, shares repurchased value	$ 387
Stock repurchase program, remaining authorized repurchase amount	$ 1,251