Supplemental Disclosures To The Consolidated Statements Of Cash Flows (Additional Information Concerning Acquisitions, Interest And Income Taxes Paid) (Details) (USD $) In Millions	9 Months Ended		12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010
Supplemental Cash Flow Information [Abstract]
Assets acquired, excluding cash	$ 148	$ 633
Business Acquisition, Purchase Price Allocation, Liabilities Assumed	(19)	(163)
Shares issued (7.6 million shares in 2010)		(183)
Contingent/deferred purchase consideration	(16)	(65)
Net cash outflow for current year acquisitions	113	222
Payments to Acquire Intangible Assets	2	3	3
Payments for Previous Acquisition	3	2
Deferred purchase consideration from prior year acquisitions	16	21
Net cash outflow for acquisitions	134	248
Interest paid	163	182
Income taxes (refunded)/paid	$ (37)	$ 82
Shares issued		7.6