Provision (Benefit) for Income Taxes (Tables)

3 Months Ended

Mar. 31, 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   March 31,
	2017		2016
	(Millions)
Current:
Federal	$	3	$	—
State	6		—
	9		—
Deferred:
Federal	15		(5		)
State	13		7
	28		2
Provision (benefit) for income taxes	$	37	$	2