Derivative Financial Instruments And Hedging Activities (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013
Other Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Notional Amount	$ 5,917	[1]
Fair Value Hedge Assets	14	[1],[2]
Other Assets [Member] | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Notional Amount	2,786
Fair Value Hedge Assets	8	[2]
Other Assets [Member] | Interest Rate Cap [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Notional Amount	1,631
Fair Value Hedge Assets	5	[2]
Other Assets [Member] | Foreign Exchange Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Notional Amount	1,500	[3]
Fair Value Hedge Assets	1	[2],[3]
Other Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Notional Amount	7,488	[4]
Fair Value Hedge Liabilities	(41)	[2],[4]
Other Liabilities [Member] | Interest Rate Swap [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Notional Amount	4,012
Fair Value Hedge Liabilities	(16)	[2]
Other Liabilities [Member] | Interest Rate Cap [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Notional Amount	1,442
Fair Value Hedge Liabilities	(6)	[2]
Other Liabilities [Member] | Foreign Exchange Contract [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Notional Amount	2,034	[3]
Fair Value Hedge Liabilities	$ (19)	[2],[3]

[1] Included in other assets on the condensed consolidated balance sheets.

[2] See Note 9 - "Fair Values of Assets and Liabilities" for further discussion of fair value disclosure related to the derivatives.

[3] The foreign exchange swaps relate to (i) intercompany loans denominated in foreign currencies (notional balances on the intercompany loans of €610 million , £432 million and 182kr million have been translated to USD) and (ii) a cross-currency swap for a securitization in the International Segment.

[4] Included in other liabilities on the condensed consolidated balance sheets.