INCOME TAXES (Tables)

12 Months Ended

Dec. 31, 2016

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	2016		2015			2014
Domestic	$	49	$	1,254		$	896
Foreign	8		(11		)	(5		)
Total	$	57	$	1,243		$	891

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

Provision (Credit) for Income Taxes
				2016								2015									2014
In millions	Current			Deferred			Total			Current		Deferred			Total			Current			Deferred		Total
Federal (1)	$	265		$	(285	)	$	(20	)	$	373	$	(31	)	$	342		$	(41	)	$	311	$	270
State and local	(3		)	(12		)	(15		)	2		(13		)	(11		)	(5		)	38		33
Foreign	3			—			3			104		—			104			1			—		1
Total	$	265		$	(297	)	$	(32	)	$	479	$	(44	)	$	435		$	(45	)	$	349	$	304

(1) In 2016, reflects the impact of the asbestos-related charge. In 2014, reflects the impact of accelerated deductions.

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

Reconciliation to U.S. Statutory Rate
In millions	2016			2015			2014
Taxes at U.S. statutory rate	$	20		$	435		$	312
U.S. manufacturing deductions	(8		)	(8		)	(26		)
Unrecognized tax benefits	(26		)	24			—
Federal tax accrual adjustments	(7		)	(7		)	(14		)
State and local tax impact	(14		)	(11		)	42
Other - net	3			2			(10		)
Total tax provision (credit)	$	(32	)	$	435		$	304
Effective tax rate	(56.1		)%	35.0		%	34.1		%

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

Deferred Tax Balances at December 31	2016					2015
In millions	Deferred Tax Assets			Deferred Tax Liabilities		Deferred Tax Assets			Deferred Tax Liabilities
Property	$	—		$	183	$	—		$	193
Tax loss and credit carryforwards	53			—		70			—
Postretirement benefit obligations (1)	442			—		407			—
Other accruals and reserves (2)	611			—		297			—
Inventory (3)	14			—		18			—
Other - net	13			2		7			1
Subtotal	$	1,133		$	185	$	799		$	194
Valuation allowances	(20		)	—		(28		)	—
Total	$	1,113		$	185	$	771		$	194

(1) Prior year was adjusted to conform to current year presentation.

(2) In 2016, the increase is primarily due to the asbestos-related charge.

(3) The Corporation elected to early adopt ASU 2015-17 in the first quarter of 2016. As a result, prior year was adjusted to reflect the reclassification of prepaid tax assets of $5 million to “Other current assets” in the consolidated balance sheets.

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

Total Gross Unrecognized Tax Benefits
In millions	2016			2015		2014
Balance at January 1	$	68		$	1	$	4
Increases related to positions taken on items from prior years	139			67		—
Settlement of uncertain tax positions with tax authorities	(206		)	—		—
Decreases due to expiration of statutes of limitations	—			—		(3		)
Balance at December 31	$	1		$	68	$	1

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
	2016	2015
United States:
Federal income tax	2004	2004
State and local income tax	2004	2004