CONSOLIDATED STATEMENT OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net sales	$ 7,196	$ 6,365	$ 5,246
Costs of products sold	5,298	4,980	4,153
Gross margin	1,898	1,385	1,093
Selling expenses	87	89	99
General and administrative expenses	310	338	252
Research and development expenses	14	19	18
Charges for integration and restructuring, closures and asset impairments (Note 17)	194	170	39
Charges for product remediation (Note 18)	290	0	0
Other operating costs (income), net (Note 19)	(128)	(53)	41
Operating income	1,131	822	644
Equity earnings from joint ventures (Note 8)	1	22	0
Non-Operating pension and other postretirement benefit (costs) credits	(62)	48	14
Interest income and other	39	43	36
Interest expense, net of capitalized interest	(393)	(431)	(341)
Earnings from continuing operations before income taxes	716	504	353
Income taxes (Note 20)	(134)	(89)	58
Earnings from continuing operations	582	415	411
Earnings from discontinued operations, net of income taxes (Note 3)	0	612	95
Net earnings	582	1,027	506
Dividends on preference shares	0	(22)	(44)
Net earnings attributable to Weyerhaeuser common shareholders	$ 582	$ 1,005	$ 462
Basic earnings per share attributable to Weyerhaeuser common shareholders (Note 5):
Continuing operations	$ 0.77	$ 0.55	$ 0.71
Discontinued operations	0.00	0.85	0.18
Net earnings per share	0.77	1.40	0.89
Diluted earnings per share attributable to Weyerhaeuser common shareholders (Note 5):
Continuing operations	0.77	0.55	0.71
Discontinued operations	0.00	0.84	0.18
Net earnings per share	0.77	1.39	0.89
Dividends paid per common share	$ 1.25	$ 1.24	$ 1.20
Weighted average shares outstanding (in thousands) (Note 5):
Basic	753,085	718,560	516,371
Diluted	756,666	722,401	519,618