Condensed Statement of Financial Position (Unaudited) (Parenthetical) (USD $) In Millions, except Share data, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Balance Sheet Related Disclosures [Abstract]
Accumulated amortization	$ 25,928	$ 26,113
Preferred Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Preferred Stock, Shares Authorized	750,000	750,000
Preferred Stock, Shares Issued	50,000	40,000
Preferred Stock, Shares Outstanding	50,000	40,000
Common Stock, Par or Stated Value Per Share	$ 14	$ 14
Common Stock, Shares Authorized	4,166,000	4,166,000
Common Stock, Shares, Issued	1,000	1,000
Common Stock, Shares, Outstanding	1,000	1,000
Assets of consolidated variable interest entities that can only be used to settle the liabilities of those VIEs	46,939
Net financing receivables of certain VIEs that can only be used to settle the liabilities of those VIEs	40,048
Investment securities of certain VIEs that can only be used to settle the liabilities of those VIEs	4,334
Nonrecourse Borrowings Of Consolidated Securitization Entities Where VIE Creditors Do Not Have Recourse To Company	28,600
Sum of accumulated other comprehensive income - net	(1,139)	(940)
Accumulated other comprehensive income - net attributable to noncontrolling interests	$ (151)	$ (129)