Derivative Instruments And Hedging Activities (Summary Of Company's Derivative Instruments) (Details) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010 Designated As Hedging Instruments [Member] Interest Rate Contract [Member]	Jun. 30, 2011 Designated As Hedging Instruments [Member] Interest Rate Contract [Member] Other Non-Current Assets [Member]	Jun. 30, 2011 Designated As Hedging Instruments [Member] Interest Rate Contract [Member] Other Non-Current Liabilities [Member]	Dec. 31, 2010 Foreign Exchange Contract [Member] Not Designated As Hedging Instruments [Member]	Jun. 30, 2011 Foreign Exchange Contract [Member] Not Designated As Hedging Instruments [Member] Other Current Assets [Member]	Jun. 30, 2011 Foreign Exchange Contract [Member] Not Designated As Hedging Instruments [Member] Accrued Expenses And Other Current Liabilities [Member]	Dec. 31, 2010 Call Option [Member] Not Designated As Hedging Instruments [Member]		Jun. 30, 2011 Call Option [Member] Not Designated As Hedging Instruments [Member] Other Current Assets [Member]		Dec. 31, 2010 Bifurcated Conversion Feature [Member] Not Designated As Hedging Instruments [Member]		Jun. 30, 2011 Bifurcated Conversion Feature [Member] Not Designated As Hedging Instruments [Member] Long-Term Debt [Member]		Dec. 31, 2010 Not Designated As Hedging Instruments [Member]	Dec. 31, 2010 Not Designated As Hedging Instruments [Member] Interest Rate Contract [Member]	Jun. 30, 2011 Not Designated As Hedging Instruments [Member] Interest Rate Contract [Member] Other Non-Current Assets [Member]	Jun. 30, 2011 Not Designated As Hedging Instruments [Member] Interest Rate Contract [Member] Other Non-Current Liabilities [Member]
Derivative assets	$ 33		$ 5		$ 4	$ 5		$ 162	[1]	$ 21	[1]					$ 173	$ 7	$ 7
Derivative liabilities	$ 31	$ 18		$ 15	$ 12		$ 8					$ 162	[1]	$ 21	[1]	$ 183	$ 9		$ 2

[1] See Note 6—Long-Term Debt and Borrowing Arrangements for further detail.