Long-Term Debt (Committed Funding Facilities) (Details) (Committed Funding Facilities [Member], USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Outstanding	$ 17,613	$ 17,909
Unused capacity	5,017	6,747
Total capacity	22,630	24,656
Bank Funding Member \| Secured Debt [Member]
Debt Instrument [Line Items]
Outstanding	3,000	2,750
Unused capacity	500	250
Total capacity	3,500	3,000
Nonbank Funding [Member] \| Secured Debt [Member]
Debt Instrument [Line Items]
Outstanding	14,613	15,159
Unused capacity	4,517	6,497
Total capacity	19,130	21,656
Revolving secured funding facilities [Member]
Debt Instrument [Line Items]
Total capacity	20,900
Revolving secured funding facilities 1 year or greater [Member]
Debt Instrument [Line Items]
Total capacity	$ 15,100

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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