Income Taxes (Tables)

9 Months Ended

Sep. 30, 2016

Income Tax Disclosure [Abstract]

Income Tax Provision (Benefit)

The income tax benefit consists of the following:

	Three Months Ended September 30,						Nine Months Ended September 30,
(millions)	2016			2015			2016			2015
Current	$	148		$	(45	)	$	213		$	64
Deferred	(285		)	69			(699		)	(244		)
Total Income Tax (Benefit) Provision	$	(137	)	$	24		$	(486	)	$	(180	)
Effective Tax Rate	48.9		%	(9.3		)%	39.5		%	30.4		%