Income Taxes (Tables)

9 Months Ended

Sep. 30, 2013

Income Tax Disclosure [Abstract]

Income Tax Provision (Benefit)

The income tax provision relating to continuing operations consists of the following: 

	Three Months Ended September 30,						Nine Months Ended September 30,
	2013			2012			2013			2012
(millions)
Current	$	53		$	37		$	161		$	138
Deferred	63			74			169			174
Total Income Tax Provision	$	116		$	111		$	330		$	312
Effective Tax Rate	37.2		%	40.4		%	29.6		%	31.2		%