INCOME TAXES (Tables)

12 Months Ended

Dec. 31, 2017

Notes To Financial Statements [Abstract]

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

The components of income tax expense were as follows (in millions):

	Year Ended December 31,
	2017			2016			2015
Current:
Federal	$	4		$	(2	)	$	(91	)
State	2			6			16
Foreign	(1		)	(2		)	2
Total current	5			2			(73		)
Deferred:
Federal	(204		)	28			7
State	(2		)	(9		)	(11		)
Foreign	10			1			(7		)
Total deferred	(196		)	20			(11		)
Total income tax (benefit) expense	$	(191	)	$	22		$	(84	)

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

Domestic and foreign pre-tax income (loss) was as follows (in millions):

	Year Ended December 31,
	2017			2016			2015
Domestic	$	(43	)	$	26		$	6
Foreign	(92		)	(12		)	(34		)
Total	$	(135	)	$	14		$	(28	)

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

A reconciliation of our income tax expense (benefit) at the federal statutory income tax rate of 35% to income tax expense (benefit) at the effective tax rate is as follows (in millions):

	Year Ended December 31,
	2017			2016			2015
Income tax expense (benefit) at the federal statutory rate	$	(47	)	$	5		$	(10	)
State and other tax expense	(2		)	1			1
Tax rate differential on foreign earnings	10			4			8
Permanent differences	4			4			4
Income from Grantor Trust	(8		)	—			—
Production tax credits/R&E tax credits	—			—			(3		)
State ITC credit	1			(4		)	—
Change in valuation allowance	31			2			(7		)
Liability for uncertain tax positions	—			16			(82		)
Adjustment to deferred tax	(1		)	(5		)	4
Impact of deferred tax re-measurement for federal tax rate change	(204		)	—			—
Tax reform transition tax	21			—			—
Expiration of non-qualified stock options	3			—			—
Other	1			(1		)	1
Total income tax expense (benefit)	$	(191	)	$	22		$	(84	)

Summary of Operating Loss Carryforwards [Table Text Block]

We had consolidated federal NOLs estimated to be approximately $240 million for federal income tax purposes as of the end of 2017. These consolidated federal NOLs will expire, if not used, in the following amounts in the following years (in millions):

	Amount of Carryforward Expiring
2028	$	10
2030	29
2031	1
2032	1
2033	197
2035	1
2036	1
	$	240

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

The tax effects of temporary differences that give rise to the deferred tax assets and liabilities are presented as follows (in millions):

	As of December 31,
	2017			2016
Deferred tax assets:
Net operating loss carryforwards	$	119		$	143
Accrued expenses	15			20
Prepaid and other costs	48			71
Deferred tax assets attributable to pass-through entities	10			17
Retirement benefits	2			3
Other	3			4
AMT and other credit carryforwards	48			55
Total gross deferred tax asset	245			313
Less: valuation allowance	(77		)	(71		)
Total deferred tax asset	168			242
Deferred tax liabilities:
Unbilled accounts receivable	3			3
Property, plant and equipment	538			780
Intangible assets	33			36
Deferred tax liabilities attributable to pass-through entities	8			22
Deferred gain on convertible debt	4			13
Swap income	—			—
Prepaid expenses	—			—
Other, net	1			5
Total gross deferred tax liability	587			859
Net deferred tax liability, including deferred tax liability held for sale	419			617
Less: Deferred tax liability held for sale (1)	7			—
Net deferred tax liability	$	412		$	617

Reconciliation Of Beginning And Ending Amounts Of Unrecognized Tax Benefits [Text Block]

A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows (in millions):

Balance at December 31, 2014	$	133
Additions based on tax positions related to the current year	12
Reductions for tax positions of prior years	(109		)
Balance at December 31, 2015	36
Additions based on tax positions related to the current year	16
Additions for tax positions of prior years	4
Reductions for lapse in applicable statute of limitations	(3		)
Reductions for tax positions of prior years	(4		)
Payment	(6		)
Balance at December 31, 2016	43
Additions based on tax positions related to the current year	1
Additions for tax positions of prior years	6
Reductions for lapse in applicable statute of limitations	(1		)
Reductions for tax positions of prior years	(2		)
Additions due to acquisitions	1
Balance at December 31, 2017	$	48