Income Taxes (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Current [Abstract]
United States federal	$ 4,000,000	$ 680,000,000	$ 1,249,000,000
Foreign	55,000,000	109,000,000	82,000,000
State and local	(14,000,000)	32,000,000	182,000,000
Total current	45,000,000	821,000,000	1,513,000,000
Deferred [Abstract]
United States federal	413,000,000	(316,000,000)	(261,000,000)
Foreign	14,000,000	63,000,000	0
State and local	11,000,000	41,000,000	(146,000,000)
Total deferred	438,000,000	(212,000,000)	(407,000,000)
Provision for income taxes	483,000,000	609,000,000	1,106,000,000
Effective Income Tax Rate, Continuing Operations, Tax Rate Reconciliation [Abstract]
Statutory tax rate	35.00%	35.00%	35.00%
Non-U.S. tax rates under U.S. rate	(1.60%)	(1.90%)	(1.60%)
State and local income taxes	(1.00%)	1.10%	0.70%
U.S. tax on non-U.S. earnings	(1.20%)	(10.30%)	1.60%
Other	1.10%	1.40%	0.50%
Valuation allowance	(3.80%)	0.00%	0.00%
Effective tax rate	28.50%	25.30%	36.20%
Amount of valuation allowance released	64,000,000
Undistributed Foreign Earnings		3,600,000,000
Increase (Decrease) in Deferred Tax Liabilities, Undistributed Foreign Earnings		(250,000,000)
Undistributed Foreign Earnings, Deferred Taxes Not Provided	4,200,000,000
Potential Deferred Tax Liability Undistributed Foreign Earnings	962,000,000
Deferred tax assets [Abstract]
Net operating loss carryforwards	366,000,000	469,000,000
Provision for credit losses	127,000,000	175,000,000
Other foreign	175,000,000	227,000,000
Employee benefit plans	13,000,000	125,000,000
Foreign tax credits	122,000,000	3,000,000
Other	209,000,000	277,000,000
Total gross deferred tax assets	1,012,000,000	1,276,000,000
Less: valuation allowance	(68,000,000)	(125,000,000)
Total deferred tax assets	944,000,000	1,151,000,000
Deferred tax liabilities [Abstract]
Leasing transactions	1,138,000,000	925,000,000
Finance receivables	614,000,000	548,000,000
Other foreign	647,000,000	588,000,000
Other	30,000,000	68,000,000
Deferred Tax Liabilities, Net	2,429,000,000	2,129,000,000
Operating Loss Carryforwards	1,200,000,000
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Balance at January 1	535,000,000	533,000,000	614,000,000
Increase - tax positions in prior years	54,000,000	25,000,000	120,000,000
Increases - tax positions in current year	7,000,000	0	0
Decrease - tax positions in prior years	(54,000,000)	(2,000,000)	(14,000,000)
Settlements	(51,000,000)	(17,000,000)	(187,000,000)
Lapse of statute of limitations	0	(4,000,000)	0
Balance at December 31	491,000,000	535,000,000	533,000,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	155,000,000	217,000,000	104,000,000
Unrecognized Tax Benefits, Expected Decrease Over the Next Twelve Months	300,000,000
Unrecognized Tax Benefits Interest Income		11,000,000
Unrecognized Tax Benefits, Interest on Income Taxes Expense	21,000,000		7,000,000
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	56,000,000	33,000,000
Deferred Tax Liabilities Net of Tax Assets	$ 1,485,000,000	$ 978,000,000