Fair Value Measurements (Changes In Fair Value Of Level 3 Liabilities Representing Acquisition Related Contingent Consideration) (Details) (USD $) In Millions					6 Months Ended
	Jun. 30, 2011		Dec. 31, 2010		Jun. 30, 2011 Contingent Consideration [Member]
Fair Value, Beginning of Period	$ 111	[1]	$ 106	[1]	$ 106
Additions					15
Payments					(6)
Revaluation Impact					(4)
Fair Value, End of Period	$ 111	[1]	$ 106	[1]	$ 111

[1] Included in accounts payable and accrued liabilities and in other liabilities in the consolidated balance sheets.