RELATED PARTIES - Schedule of Changes in Deposit of Timberlands (Details) - Twin Creeks Venture $ in Millions	12 Months Ended
Dec. 31, 2017 USD ($)
Related Party Transaction [Line Items]
Beginning Balance	$ 426
Lease payments to Twin Creeks Venture	(8)
Distributions from Twin Creeks Venture	2
Recognition of contributed timberlands	(420)
Ending Balance	$ 0

Amount of increase (decrease) in deposit liabilities classified as other.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3095-108585

Name:	us-gaap_IncreaseDecreaseInOtherDeposits
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration