Income Taxes (Schedule of Income Before Income Tax, Domestic and Foreign) (Detail) - USD ($) $ in Millions	3 Months Ended																12 Months Ended
	Dec. 31, 2016	[1]	Sep. 30, 2016	[1]	Jun. 30, 2016	[1]	Mar. 31, 2016	[1]	Dec. 31, 2015	[2]	Sep. 30, 2015	[2]	Jun. 30, 2015	[2]	Mar. 31, 2015	[3]	Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2014
Income Tax Disclosure [Abstract]
U.S.																	$ 573		$ 1,147		$ 565
Non-U.S.																	383		119		307
EARNINGS (LOSS) FROM CONTINUING OPERATIONS BEFORE INCOME TAXES AND EQUITY EARNINGS (LOSSES)	$ 280		$ 373		$ (14)		$ 317		$ 265		$ 329		$ 266		$ 406		$ 956	[1]	$ 1,266	[2]	$ 872

[1] Includes the following pre-tax charges (gains): 2016In millions Q1 Q2 Q3 Q4Riegelwood mill conversion costs $9 $— $— $—India Packaging evaluation write-off — — 17 —Early debt extinguishment costs — — 29 —Write-off of certain regulatory pre-engineering costs — — 8 —Costs associated with the newly acquired pulp business — 5 7 19Asia Box impairment / restructuring 37 28 5 —Gain on sale of investment in Arizona Chemical (8) — — —Turkey mill closure — — — 7Amortization of Weyerhaeuser inventory fair value step-up — — — 19Total $38 $33 $66 $45

[2] Includes the following pre-tax charges (gains): 2015In millions Q1 Q2 Q3 Q4Riegelwood mill conversion costs, net of proceeds from sale of the Carolina Coated Bristols brand $— $(14) $7 $15Timber monetization restructuring — — 17 (1)Early debt extinguishment costs — 207 — —Refund and state tax credits — (4) — —IP-Sun JV impairment — — 186 (12)Legal reserve adjustment — — — 15Impairment of Orsa goodwill and trade name intangible — — — 137Other items — 1 1 4Total $— $190 $211 $158

[3] Includes the following tax expenses (benefits): 2015 Q1 Q2 Q3 Q4Tax expense for cash pension $— $23 $— $—Tax benefit related to IP-Sun JV — — (67) —Other items — 5 — 2Tax impact of other special items — (67) (3) (13)Total $— $(39) $(70) $(11)