ACQUISITIONS Narrative (Details) € in Millions, $ in Millions		3 Months Ended					9 Months Ended		12 Months Ended
	May 02, 2016 USD ($) Facilities	Jun. 30, 2017 USD ($)	Jun. 30, 2017 EUR (€)	Mar. 31, 2017 USD ($)	Jun. 30, 2016 USD ($)	Jun. 30, 2016 EUR (€)	Sep. 30, 2017 USD ($) Tons	Sep. 30, 2016 USD ($)	Dec. 31, 2016 USD ($)	Dec. 01, 2016 USD ($)
Business Acquisition [Line Items]
Acquisitions, net of cash acquired							$ 45	$ 56
Tangier, Morocco Facility
Business Acquisition [Line Items]
Payments to acquire businesses, gross		$ 46	€ 40
Business combination,purchase price allocation, percentage allocated to property, plant and equipment		80.00%	80.00%
Weyerhaeuser Pulp Business
Business Acquisition [Line Items]
Acquisitions, net of cash acquired	$ 2,200
Inventory write-up				$ 14					$ 33
Inventory adjusment, net of tax				8
Plants, properties and equipment										$ 1,711
Long-term assets										$ 6
Holmen Paper Newsprint Mill
Business Acquisition [Line Items]
Acquisitions, net of cash acquired					$ 59	€ 53
Annual production capacity in metric tons | Tons							440,000
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				$ 6
2611 Pulp Mills | Weyerhaeuser Pulp Business
Business Acquisition [Line Items]
Number of businesses acquired | Facilities	4
NBSK Mill | Weyerhaeuser Pulp Business
Business Acquisition [Line Items]
Number of businesses acquired | Facilities	1
Converting Facility | Weyerhaeuser Pulp Business
Business Acquisition [Line Items]
Number of businesses acquired | Facilities	2
4991 Cogeneration Services and Small Power Producers | Holmen Paper Newsprint Mill
Business Acquisition [Line Items]
Percentage of equity interest					50.00%