CONSOLIDATED STATEMENT OF CASH FLOWS - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operations:
Net earnings		$ 506	$ 1,826	$ 563
Noncash charges (credits) to income:
Depreciation, depletion and amortization		479	500	472
Deferred income taxes, net (Note 20)		0	205	(29)
Pension and other postretirement benefits (Note 9)		42	(152)	101
Share-based compensation expense (Note 17)		31	40	42
Charges for impairment of assets (Note 18)		15	2	372
(Earnings) loss from equity affiliates		105	1	(1)
Net gains on dispositions of assets and operations(1) (Note 3)	[1]	(38)	(1,050)	(58)
Foreign exchange transaction losses (Note 19)		47	27	7
Change in, net of acquisition:
Receivables less allowances		17	29	(27)
Receivable for taxes		(5)	76	(6)
Inventories		10	(66)	(13)
Real estate and land		0	(133)	(166)
Prepaid expenses		3	17	(26)
Accounts payable and accrued liabilities		(35)	(98)	(51)
Deposits on land positions and other assets		0	15	(18)
Pension and postretirement contributions / benefit payments		(83)	(101)	(137)
Other		(30)	(50)	(21)
Net cash from operations		1,064	1,088	1,004
Cash flows from investing activities:
Property and equipment		(443)	(354)	(261)
Timberlands reforestation		(40)	(41)	(32)
Acquisition of timberlands		(36)	0	0
Acquisition of Longview Timber LLC, net of cash acquired (Note 4)		0	0	(1,581)
Net proceeds from Real Estate Divestiture, net of cash divested (Note 3)		0	707	0
Proceeds from sale of assets and operations		19	28	20
Net proceeds of investments held by special purpose entities (Note 10)		0	0	22
Other		13	21	3
Cash from investing activities		(487)	361	(1,829)
Cash flows from financing activities:
Net proceeds from issuance of common shares (Note 4)		0	0	897
Net proceeds from issuance of preference shares (Note 4)		0	0	669
Net proceeds from issuance of debt (Note 13)		0	0	1,044
Net proceeds from issuance of Weyerhaeuser Real Estate Company (WRECO) debt (Note 3)		0	887	0
Deposit of WRECO debt proceeds into escrow (Note 3)		0	(887)	0
Cash dividends on common shares		(619)	(563)	(458)
Cash dividends on preference shares		(44)	(44)	(23)
Change in book overdrafts		0	(17)	7
Payments on debt (Note 13)		0	0	(1,567)
Exercises of stock options		34	119	162
Repurchase of common stock (Note 16)		(518)	(203)	0
Other		2	4	31
Cash from financing activities		(1,145)	(704)	762
Net change in cash and cash equivalents		(568)	745	(63)
Cash and cash equivalents at beginning of year		1,580	835	898
Cash and cash equivalents at end of year		1,012	1,580	835
Cash paid (received) during the year for:
Interest, net of amounts capitalized of $7 in 2015, $13 in 2014 and $21 in 2013		347	319	366
Income taxes		14	(37)	8
Noncash investing and financing activity:
Acquisition of Longview Timber LLC, debt assumed (Note 4)		0	0	1,070
Common shares tendered in WRECO divestiture (Note 3)		$ 0	$ 1,954	$ 0

[1] (1) Includes gain on timberland exchanges.