Income Taxes (Tables)

9 Months Ended

Sep. 30, 2011

Notes to Financial Statements [Abstract]

Income tax provision (benefit)

The income tax provision consists of the following:

	Three Months Ended September 30,						Nine Months Ended September 30,
	2011			2010			2011			2010
(millions)
Current	$	179		$	42		$	289		$	180
Deferred		102			24			147			109
Total Income Tax Provision	$	281		$	66		$	436		$	289
Effective Tax Rate		39	%		22	%		37	%		30	%