Derivative Financial Instruments And Hedging Activities (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013 Interest Rate Swap [Member]	Mar. 31, 2012 Interest Rate Swap [Member]	Dec. 31, 2011 Interest Rate Swap [Member]	Jun. 30, 2013 Interest Rate Cap [Member]	Jun. 30, 2013 Foreign Exchange Contract [Member]	Jun. 30, 2013 Derivative Financial Instruments, Assets [Member]	Dec. 31, 2012 Derivative Financial Instruments, Assets [Member]	Jun. 30, 2013 Derivative Financial Instruments, Liabilities [Member]	Jun. 30, 2013 Other Assets [Member] Interest Rate Swap [Member]	Jun. 30, 2013 Other Assets [Member] Interest Rate Cap [Member]	Jun. 30, 2013 Derivative Financial Instruments, Assets [Member] Foreign Exchange Contract [Member]	Jun. 30, 2013 Interest Rate Swap And Cap Agreements [Member] Interest Rate Swap [Member]	Jun. 30, 2013 Interest Rate Swap And Cap Agreements [Member] Interest Rate Cap [Member]	Jun. 30, 2013 Derivative Financial Instruments, Liabilities [Member] Foreign Exchange Contract [Member]
Derivatives, Fair Value [Line Items]
Notional Amount of Interest Rate Derivatives						$ 6,734.0	$ 775.1	$ 6,268.0	$ 2,313.0	$ 2,419.0	$ 2,002.0	$ 2,502.0	$ 2,266.0	$ 1,500.0
Fair Value Hedge Assets	7	2	2	7	17	31
Fair Value Hedge Liabilities	$ 20	$ 2	$ 6	$ 7	$ 3			$ 30