Goodwill (Tables)

9 Months Ended

Sep. 30, 2014

Goodwill And Intangible Assets Disclosure [Abstract]

Changes in Carrying Amount of Goodwill

The changes in the carrying amount of goodwill are as follows (in millions):

Balance at January 1, 2014	$	1,869
Acquisitions		115
Dispositions		(126	)
Balance at September 30, 2014	$	1,858