Income Taxes Income Taxes (Tables)

12 Months Ended

Dec. 31, 2016

Income Tax Disclosure [Abstract]

Schedule of Components of Income Tax Expense (Benefit)

Income tax (expense) benefit consists of the following:

	Year Ended December 31,
	2016			2015		2014
	(Millions)
Current:
Federal income tax expense	$	(19	)	$	—	$	—
State income tax expense	(2		)	—		(2		)
Deferred:
Federal income tax (expense) benefit	(22		)	97		—
State income tax (expense) benefit	(3		)	5		(9		)
Total income tax (expense) benefit	$	(46	)	$	102	$	(11	)

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

Deferred income tax assets and liabilities consisted of the following:

	December 31,
	2016			2015
	(Millions)
Deferred income tax assets:
Net operating loss	$	—		$	58
Total deferred income tax assets	—			58
Deferred income tax liabilities:
Property, plant and equipment and intangibles - federal	—			(35		)
Property, plant and equipment and intangibles - state	(28		)	(26		)
Total deferred income tax liabilities	(28		)	(61		)
Net deferred income tax liabilities	(28		)	(3		)
Deferred income tax assets, net - noncurrent	—			23
Deferred income tax liabilities, net - noncurrent	(28		)	(26		)
Net deferred income tax liabilities	$	(28	)	$	(3	)