Financial Information By Industry Segment And Geographic Area Financial Information By Industry Segment and Geographic Area (Information By Geographic Area, Net Sales Footnotes) (Details) - USD ($) $ in Millions		3 Months Ended								12 Months Ended
		Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018		Dec. 31, 2017		Dec. 31, 2016
Segment Reporting Information [Line Items]
Revenue from contract with customer, including assessed tax		$ 5,951	$ 5,901	$ 5,833	$ 5,621	$ 5,711	$ 5,517	$ 5,383	$ 5,132	$ 23,306	[1]	$ 21,743	[1]	$ 19,495	[1]
Corporate special items	[2]									9		76		55
Restructuring and other charges, net										29		67		54
Payments to acquire productive assets										1,572		1,280		1,241
Depreciation, amortization and cost of timber harvested	[3],[4]									1,328		1,343		1,124
External sales by reportable segment										23,306		21,743		19,495
United States (k)
Segment Reporting Information [Line Items]
Segment reporting information, unaffiliated revenue										3,100		2,900		1,800
Corporate (c)
Segment Reporting Information [Line Items]
Payments to acquire productive assets	[5]									25		21		20
Depreciation, amortization and cost of timber harvested	[3],[4],[6]									5		10		12
Corporate Segment [Member] | Corporate (c)
Segment Reporting Information [Line Items]
Restructuring and other charges, net	[7]									(21)		67		47
Corporate and Other | Corporate (c)
Segment Reporting Information [Line Items]
External sales by reportable segment	[8]									309		131		201
Previously Divested Businesses [Member]
Segment Reporting Information [Line Items]
Revenue from contract with customer, including assessed tax	[2]									0		15		42
Operating income (loss)	[2]									0		0		(2)
Corporate special items	[2]									0		9		9
Previously Divested Businesses [Member] | Corporate (c)
Segment Reporting Information [Line Items]
Payments to acquire productive assets	[5]									0		0		1
Depreciation, amortization and cost of timber harvested	[5],[9]									0		1		2
Previously Divested Businesses [Member] | Corporate Segment [Member]
Segment Reporting Information [Line Items]
Restructuring and other charges, net										0		9		9
Previously Divested Businesses [Member] | Corporate and Other | Corporate (c)
Segment Reporting Information [Line Items]
External sales by reportable segment	[3]									$ 0		$ 15		$ 42

[1] Net sales are attributed to countries based on the location of the seller.

[2] Includes sales of $0 million in 2018, $15 million in 2017 and $42 million in 2016, operating profits (losses) of $0 million in 2018, $0 million in 2017 and $(2) million in 2016, and corporate special items expense of $0 million in 2018, $9 million in 2017 and $9 million in 2016, from previously divested businesses.

[3] Excludes accelerated depreciation related to the closure and/or repurposing of mills in 2016.

[4] Prior years recast to reflect current methodology for allocation of Corporate depreciation and amortization to the business segments. There is no change to segment operating profit.

[5] Includes corporate assets and assets of previously divested businesses of $0 million in 2018, $0 million in 2017 and $1 million in 2016.

[6] Includes $0 million in 2018, $1 million in 2017 and $2 million in 2016, from previously divested businesses.

[7] Includes corporate expenses and expenses of $0 million in 2018, $9 million in 2017 and $9 million in 2016, from previously divested businesses.

[8] Includes $0 million in 2018, $15 million in 2017, and $42 million in 2016, from previously divested businesses.

[9] Includes corporate assets, assets of businesses held for sale and assets of previously divested businesses.