Provision (Benefit) for Income Taxes (Tables)

9 Months Ended

Sep. 30, 2017

Income Tax Disclosure [Abstract]

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

The Provision (benefit) for income taxes includes:

	Three Months Ended   September 30,						Nine Months Ended   September 30,
	2017			2016			2017		2016
	(Millions)
Current:
Federal	$	7		$	—		$	10	$	—
State	9			1			17		1
Foreign	—			—			—		(1		)
	16			1			27		—
Deferred:
Federal	(11		)	8			63		(49		)
State	19			71			36		60
Foreign	—			(11		)	—		(85		)
	8			68			99		(74		)
Provision (benefit) for income taxes	$	24		$	69		$	126	$	(74	)