Acquisitions And Joint Ventures (Narrative) (Details) € in Millions, $ in Millions	3 Months Ended							12 Months Ended
	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Jun. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Sep. 30, 2016 USD ($)	Jun. 30, 2016 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2017 EUR (€)	Dec. 31, 2016 USD ($) Tons	Dec. 31, 2016 EUR (€) Tons	Dec. 31, 2015 USD ($)
Business Acquisition [Line Items]
Payments to acquire businesses, net of cash acquired								$ 45		$ 2,228		$ 0
Inventory adjustment				$ 14	$ 19
Increase (decrease) in inventories								87		(11)		131
Business Combination, Bargain Purchase, Gain Recognized, Amount								6		0		0
Tangier, Morocco Facility [Member]
Business Acquisition [Line Items]
Provisional payments to acquired business								46	€ 40
Payments to acquire businesses, net of cash acquired								38	€ 33
Net sales since acquisition date								6
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual								(1)
Weyerhaeuser Pulp Business [Member]
Business Acquisition [Line Items]
Payments to acquire businesses, net of cash acquired										2,200
Business Acquisition, Pro Forma Revenue										20,800		22,200
Business combination pro forma earnings from continuing operations before income taxes and equity earnings										900		1,300
Net sales since acquisition date										$ 111
Number of fluff pulp mills acquired										4	4
Number of kraft mills acquired										1	1
Number of converting facilities acquired										2	2
Inventory adjustment										$ 33		33
Increase (decrease) in inventories								14		19
Increase (decrease) in inventories, net of tax								8		12
Integration related costs	$ 18	$ 6	$ 5	4	$ 19	$ 7	$ 5			28
Integration related costs, net of tax										18
Intangibles adjustment										18		18
Non-recurring integration costs										30		$ 30
Acquisition deal costs										12
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual										(21)
Holmen Paper Newsprint Mill [Member]
Business Acquisition [Line Items]
Payments to acquire businesses, net of cash acquired										59	€ 53
Net sales since acquisition date										90
Business Combination, Bargain Purchase, Gain Recognized, Amount				$ 6				$ 6
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual										$ (2)
Cogeneration Facility [Member] | Holmen Paper Newsprint Mill [Member]
Business Acquisition [Line Items]
Percentage of equity interest							50.00%
Annual production capacity | Tons										440,000	440,000