INCOME TAXES - Items Included in Our Deferred Income Tax Assets (Liabilities) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Postretirement benefits	$ 101	$ 102
Pension	369	57
Real estate impairments	0	121
State tax credits	56	59
Net operating loss carryforwards	86	110
Cellulosic biofuel producers credit	100	80
Other	223us-gaap_DeferredTaxAssetsOther	260us-gaap_DeferredTaxAssetsOther
Gross deferred tax assets	935us-gaap_DeferredTaxAssetsGross	789us-gaap_DeferredTaxAssetsGross
Valuation allowance	(72)	(89)
Net deferred tax assets	863us-gaap_DeferredTaxAssetsNet	700us-gaap_DeferredTaxAssetsNet
Property, plant and equipment	(523)	(540)
Timber installment notes	(180)	(180)
Other	(130)us-gaap_DeferredTaxLiabilitiesOther	(130)us-gaap_DeferredTaxLiabilitiesOther
Deferred tax liabilities	(833)us-gaap_DeferredTaxLiabilities	(850)us-gaap_DeferredTaxLiabilities
Net deferred tax asset (liability)	$ 30us-gaap_DeferredTaxAssetsLiabilitiesNet	$ (150)us-gaap_DeferredTaxAssetsLiabilitiesNet

Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Deferred Tax Asset

-URI http://asc.fasb.org/extlink&oid=6510090