Income Taxes (Tables)

6 Months Ended

Jun. 30, 2016

Income Tax Disclosure [Abstract]

Income Tax Provision (Benefit)

The income tax benefit consists of the following:

	Three Months Ended June 30,						Six Months Ended June 30,
(millions)	2016			2015			2016			2015
Current	$	45		$	99		$	65		$	109
Deferred	(228		)	(283		)	(414		)	(312		)
Total Income Tax Benefit	$	(183	)	$	(184	)	$	(349	)	$	(203	)
Effective Tax Rate	36.7		%	62.8		%	36.7		%	60.8		%