Divestitures/Spinoff Divestitures/Spinoff (Reconciliation of Major Line Items Constituting Pre-Tax Profit (Loss) of Discontinued Operations) (Details) - USD ($) $ in Millions	3 Months Ended												12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	[1]	Sep. 30, 2014	[1]	Jun. 30, 2014	[1]	Mar. 31, 2014	[1]	Dec. 31, 2015	Dec. 31, 2014		Dec. 31, 2013
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued operations, net of taxes	$ 0	$ 0	$ 0	$ 0	$ (9)		$ 16		$ (13)		$ (7)		$ 0	$ (13)	[1]	$ (309)
Discontinued Operations [Member] | xpedx divestiture [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net Sales														2,604		5,597
Costs of products sold														2,309		4,941
Selling and administrative expenses														191		409
Depreciation, amortization and cost of timber harvested														9		16
Distribution expense														69		149
Restructuring and other charges														25		54
Impairment of goodwill and other intangibles														0		400
Other expense														3		7
Earnings (Loss) Before Income Tax and Equity Earnings														(2)		(379)
Discontinued Operation, Tax Effect of Discontinued Operation														(1)		(25)
Discontinued operations, net of taxes														$ (1)		$ (354)

[1] Includes the after-tax operating earnings of the xpedx business prior to the spin-off and the following after-tax charges (gains): 2014 Q1 Q2 Q3 Q4xpedx spinoff $10 $20 $(14) $—Building Products divestiture 2 — (2) 9xpedx restructuring — (1) — —Total $12 $19 $(16) $9