Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Current [Abstract]
United States federal		$ (454)	$ (198)	$ 185
Current Foreign Tax Expense (Benefit)		161	154	169
State and local		(26)	(38)	(55)
Total current		(319)	(82)	299
Deferred [Abstract]
United States federal		893	193	0
Foreign		93	(6)	(29)
State and local		56	44	7
Total deferred		1,042	231	(22)
Provision for income taxes		$ 723	$ 149	$ 277
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		(3.00%)	(3.00%)	(2.30%)
State and local income taxes		1.00%	(0.20%)	(1.00%)
U.S. tax on non-U.S. earnings		0.20%	(21.40%)	(15.00%)
Other		(0.20%)	(2.40%)	1.90%
Valuation allowance		1.70%	0.00%	(2.80%)
Effective tax rate		34.70%	8.00%	15.80%
Undistributed Earnings of Foreign Subsidiaries				$ 500
Undistributed Foreign Earnings, Deferred Taxes Not Provided		$ 2,900
Potential Deferred Tax Liability Undistributed Foreign Earnings		600
Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Amount	$ 360
Deferred tax assets [Abstract]
Net operating loss carryforwards		540	$ 227
Provision for credit losses		87	140
Other foreign		75	186
Employee benefit plans		10	11
Foreign tax credits		756	685
Other		280	282
Total gross deferred tax assets		1,748	1,531
Less: valuation allowance		(47)	(10)
Total deferred tax assets		1,701	1,521
Deferred tax liabilities [Abstract]
Leasing transactions		3,338	2,035
Finance receivables		688	647
Other foreign		330	480
Other		18	23
Deferred Tax Liabilities, Net		4,374	3,185
Deferred Tax Liabilities Net of Tax Assets		2,673	1,664
Amount of valuation allowance released		47
Operating Loss Carryforwards		1,600
Net operating loss carryforwards		540	227
Reconciliation of Unrecognized Tax Benefits [Roll Forward]
Balance at January 1		111	159	491
Increase - tax positions in prior years		9	28	28
Increases - tax positions in current year		1	1	1
Decrease - tax positions in prior years		(22)	(44)	(68)
Settlements		(8)	(33)	(293)
Balance at December 31		91	111	159
Unrecognized Tax Benefits that Would Impact Effective Tax Rate		76	88	128
Unrecognized Tax Benefits Interest Income		3		$ 17
Unrecognized Tax Benefits, Interest on Income Taxes Expense			13
Unrecognized Tax Benefits, Interest on Income Taxes Accrued		$ 37	$ 50