CONSOLIDATED STATEMENT OF OPERATIONS - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net sales	$ 7,476	$ 7,196	$ 6,365
Costs of sales	5,592	5,298	4,980
Gross margin	1,884	1,898	1,385
Selling expenses	88	87	89
General and administrative expenses	318	310	338
Research and development expenses	8	14	19
Charges for integration and restructuring, closures and asset impairments (Note 18)	2	194	170
Charges (recoveries) for product remediation, net (Note 19)	0	290	0
Other operating costs (income), net (Note 20)	74	(128)	(53)
Operating income	1,394	1,131	822
Non-operating pension and other postretirement benefit (costs) credits	(272)	(62)	48
Interest income and other	60	40	65
Interest expense, net of capitalized interest	(375)	(393)	(431)
Earnings from continuing operations before income taxes	807	716	504
Income taxes (Note 21)	(59)	(134)	(89)
Earnings from continuing operations	748	582	415
Earnings from discontinued operations, net of income taxes (Note 4)	0	0	612
Net earnings	748	582	1,027
Dividends on preference shares	0	0	(22)
Net earnings attributable to Weyerhaeuser common shareholders	$ 748	$ 582	$ 1,005
Basic earnings per share attributable to Weyerhaeuser common shareholders (Note 6):
Continuing operations		$ 0.77	$ 0.55
Discontinued operations	$ 0.00	0.00	0.85
Net earnings per share	0.99	0.77	1.40
Diluted earnings per share attributable to Weyerhaeuser common shareholders (Note 6):
Continuing operations		0.77	0.55
Discontinued operations	0.00	0.00	0.84
Net earnings per share	$ 0.99	$ 0.77	$ 1.39
Weighted average shares outstanding (in thousands) (Note 6):
Basic	754,556	753,085	718,560
Diluted	756,827	756,666	722,401