ACQUISITIONS Narrative (Details) € in Millions, $ in Millions		3 Months Ended			6 Months Ended		12 Months Ended
	May 02, 2016 USD ($) Facilities	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Mar. 31, 2016 USD ($)	Jun. 30, 2016 USD ($) Tons	Jun. 30, 2016 EUR (€)	Dec. 31, 2016 USD ($)	Dec. 01, 2016 USD ($)
Business Acquisition [Line Items]
Inventory write-up		$ 14
Net bargain purchase gain on acquisition of business		6		$ 0
Weyerhaeuser Pulp Business [Member]
Business Acquisition [Line Items]
Payments to acquire businesses, gross	$ 2,200
Inventory write-up			$ 14				$ 33
Inventory adjusment, net of tax			$ 8
Plants, properties and equipment								$ 1,711
Holmen Paper Newsprint Mill [Member]
Business Acquisition [Line Items]
Net bargain purchase gain on acquisition of business		6
Annual production capacity in metric tons | Tons					419,000
Acquisitions, net of cash acquired					$ 59	€ 53
Plants, properties and equipment					60
Current assets					14
Equity method investments					14
Long-term assets					5
Currrent liabilities					9
Long-term liabilities related to supply contract					$ 16
Bargain purchase gain		9
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual		$ (3)
2611 Pulp Mills [Member] | Weyerhaeuser Pulp Business [Member]
Business Acquisition [Line Items]
Number of businesses acquired | Facilities	4
NBSK mill [Member] | Weyerhaeuser Pulp Business [Member]
Business Acquisition [Line Items]
Number of businesses acquired | Facilities	1
Converting facility [Member] | Weyerhaeuser Pulp Business [Member]
Business Acquisition [Line Items]
Number of businesses acquired | Facilities	2
4991 Cogeneration Services and Small Power Producers [Member] | Holmen Paper Newsprint Mill [Member]
Business Acquisition [Line Items]
Percentage of equity interest					50.00%