INCOME TAXES (Tables)

12 Months Ended

Dec. 31, 2015

Income Tax Expense (Benefit), Continuing Operations [Abstract]

Schedule of Income before Income Tax, Domestic and Foreign [Table Text Block]

Domestic and Foreign Components of Income (Loss) Before Income Taxes
In millions	2015			2014			2013
Domestic (1)	$	1,254		$	896		$	1,077
Foreign	(11		)	(5		)	(10		)
Total	$	1,243		$	891		$	1,067

(1) In 2013, the domestic component of "Income Before Income Taxes" included a gain of $368 million for the sale of Dow's Polypropylene Licensing and Catalysts business.

Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]

Provision for Income Taxes
			2015									2014						2013
In millions	Current		Deferred			Total			Current			Deferred		Total		Current		Deferred			Total
Federal (1)	$	373	$	(31	)	$	342		$	(41	)	$	311	$	270	$	337	$	18		$	355
State and local	2		(13		)	(11		)	(5		)	38		33		5		(47		)	(42		)
Foreign	104		—			104			1			—		1		6		—			6
Total	$	479	$	(44	)	$	435		$	(45	)	$	349	$	304	$	348	$	(29	)	$	319

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

Reconciliation to U.S. Statutory Rate
In millions	2015			2014			2013
Taxes at U.S. statutory rate	$	435		$	312		$	374
U.S. manufacturing deductions	(8		)	(26		)	(7		)
Benefit of dividend income from investments in related companies	—			—			(6		)
Audit settlement and court case impact	—			—			20
Unrecognized tax benefits	24			—			(30		)
Federal tax accrual adjustments	(7		)	(14		)	(5		)
State and local tax impact	(11		)	42			(38		)
Other - net	2			(10		)	11
Total tax provision	$	435		$	304		$	319
Effective tax rate	35.0		%	34.1		%	29.9		%

Schedule of Deferred Tax Assets and Liabilities [Table Text Block]

Deferred Tax Balances at December 31	2015					2014
In millions	Deferred Tax Assets			Deferred Tax Liabilities		Deferred Tax Assets			Deferred Tax Liabilities
Property	$	—		$	193	$	—		$	197
Tax loss and credit carryforwards	70			—		82			—
Postretirement benefit obligations	802			395		818			420
Other accruals and reserves	297			—		263			3
Inventory	23			—		53			—
Other - net	7			1		2			1
Subtotal	$	1,199		$	589	$	1,218		$	621
Valuation allowances	(28		)	—		(53		)	—
Total	$	1,171		$	589	$	1,165		$	621

Schedule of Total Gross Unrecognized Tax Benefits [Table Text Block]

Total Gross Unrecognized Tax Benefits
In millions	2015		2014			2013
Balance at January 1	$	1	$	4		$	166
Increases related to positions taken on items from prior years	67		—			1
Decreases related to positions taken on items from prior years	—		—			(7		)
Settlement of uncertain tax positions with tax authorities	—		—			(154		)
Decreases due to expiration of statutes of limitations	—		(3		)	(2		)
Balance at December 31	$	68	$	1		$	4

Schedule of Tax Years Subject to Examination by Major Tax Jurisdiction

Tax Years Subject to Examination by Major Tax Jurisdiction at December 31
Jurisdiction	Earliest Open Year
	2015	2014
United States:
Federal income tax	2004	2004
State and local income tax	2004	2004