Income Taxes (Tables)

3 Months Ended

Mar. 31, 2013

Income Tax Disclosure [Abstract]

Income Tax Provision (Benefit)

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

	Three Months Ended March 31,
	2013			2012
(millions)
Current	$	36		$	44
Deferred	50			42
Total Income Tax Provision	$	86		$	86
Effective Tax Rate	27.1		%	25.8		%