Goodwill (Tables)

12 Months Ended

Dec. 31, 2011

Goodwill [Abstract]

Changes in the carrying amount of goodwill

Note 9.  Goodwill

Changes in the carrying amount of goodwill were as follows:

	Year Ended December 31,
	2011		2010
(millions)
Goodwill, Beginning Balance	$	696	$	758
Amount Allocated to Sale of Business Unit (1)		-		(61	)
Other		-		(1	)
Goodwill, Ending Balance	$	696	$	696

(1) See Note 3 – Acquisitions and Divestitures.