Goodwill And Other Intangibles (Changes In The Carrying Amount Of Goodwill) (Details) (USD $) In Millions	6 Months Ended
	Jun. 30, 2011		Jun. 30, 2010
Goodwill And Other Intangibles
Balance as of January 1, as reported	$ 6,420	[1]	$ 5,990	[1]
Goodwill acquired	76		288
Other adjustments	99	[2]	(121)	[2]
Balance at June 30	$ 6,595		$ 6,157

[1] Amounts in 2010 excluded goodwill and accumulated impairment losses related to Kroll, which were reclassified to discontinued operations.

[2] Primarily foreign exchange.