Income Taxes (Deferred Income Taxes) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Aggregate deferred income tax amounts
Deferred tax assets	$ (13,224)	$ (11,876)
Deferred tax liabilities	18,010	17,876
Net deferred income tax liability	4,786	6,000
Components of Deferred Tax Assets and Liabilities
Intangible assets	1,943	1,666
Investment in global subsidiaries	(1,883)	(1,689)
Non-U.S. loss carryforwards	(3,791)	(3,049)
Other - net	(4,910)	(5,163)
Financing leases	4,075	4,506
Operating leases	6,284	6,141
Allowance for losses	(2,640)	(1,975)
Cash flow hedges	163	115
Other - net	(5,400)	(5,134)
Net unrealized gains (losses) on securities	145	314
Net deferred income tax liability	4,786	6,000
Valuation allowance	862	628
Expires With In Three Years [Member]
Components of Deferred Tax Assets and Liabilities
Non-U.S. loss carryforwards	(17)
Expires After Three Year And Before Fifteen Years [Member]
Components of Deferred Tax Assets and Liabilities
Non-U.S. loss carryforwards	(427)
May Be Carried Indefinitely [Member]
Components of Deferred Tax Assets and Liabilities
Non-U.S. loss carryforwards	$ (3,347)