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, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017		Dec. 31, 2016		Dec. 31, 2015
Segment Reporting Information [Line Items]
Revenue, Net		$ 5,711	$ 5,517	$ 5,383	$ 5,132	$ 5,000	$ 4,864	$ 4,914	$ 4,717	$ 21,743	[1]	$ 19,495	[1]	$ 20,675	[1]
Depreciation, Depletion and Amortization	[2]									1,343		1,124		1,167
External sales by reportable segment										21,743		19,495		20,675
Segment Reporting Information Restructuring And Other Charges	[3]									(76)		(55)		(422)
Restructuring and other charges										67		54		252
Payments to Acquire Productive Assets										1,280		1,241		1,310
United States (h)
Segment Reporting Information [Line Items]
Segment reporting information, unaffiliated revenue										2,900		1,800		1,800
Corporate
Segment Reporting Information [Line Items]
Depreciation, Depletion and Amortization	[2],[4]									56		54		121
Payments to Acquire Productive Assets	[5]									21		20		78
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue, Net	[3]									(42)		119		1,085
Corporate Segment [Member] | Corporate
Segment Reporting Information [Line Items]
Restructuring and other charges	[6]									67		47		252
Corporate and Other [Member] | Corporate
Segment Reporting Information [Line Items]
External sales by reportable segment	[7]									131		201		1,111
Previously Divested Businesses [Member]
Segment Reporting Information [Line Items]
Operating Income (Loss)	[3]									0		(2)		(62)
Segment Reporting Information Restructuring And Other Charges	[3]									9		9		184
Previously Divested Businesses [Member] | Corporate
Segment Reporting Information [Line Items]
Depreciation, Depletion and Amortization	[5],[8]									1		2		74
Payments to Acquire Productive Assets	[5]									0		1		26
Previously Divested Businesses [Member] | Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Revenue, Net	[3]									15		42		931
Previously Divested Businesses [Member] | Corporate Segment [Member] | Corporate
Segment Reporting Information [Line Items]
Restructuring and other charges										9		9		10
Previously Divested Businesses [Member] | Corporate and Other [Member] | Corporate
Segment Reporting Information [Line Items]
External sales by reportable segment	[2]									$ 15		$ 42		$ 930

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

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

[3] Includes sales of $15 million in 2017, $42 million in 2016 and $931 million in 2015, operating profits (losses) of $0 million in 2017, $(2) million in 2016 and $(62) million in 2015, and corporate special items expense of $9 million in 2017, $9 million in 2016 and $184 million in 2015, from previously divested businesses

[4] Includes $1 million in 2017, $2 million in 2016 and $74 million in 2015 from previously divested businesses.

[5] Includes corporate assets and assets of previously divested businesses of $0 million in 2017, $1 million in 2016 and $26 million in 2015.

[6] Includes corporate expenses and expenses of $9 million in 2017, $9 million in 2016 and $10 million in 2015, from previously divested businesses.

[7] Includes $15 million in 2017, $42 million in 2016, and $930 million in 2015 from previously divested businesses.

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