Presentation - Reconciliations between Consolidated and Sector Deferred Taxes (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Sector balance sheet presentation of deferred income tax assets [Abstract]
Deferred income tax assets	$ 14,064	$ 15,125
Sector balance sheet presentation of deferred income tax liabilities [Abstract]
Deferred income tax liabilities	595	696
Intersector [Member]
Sector balance sheet presentation of deferred income tax assets [Abstract]
Deferred income tax assets	15,217	16,025
Sector balance sheet presentation of deferred income tax liabilities [Abstract]
Deferred income tax liabilities	1,748	1,596
Automotive [Member]
Sector balance sheet presentation of deferred income tax assets [Abstract]
Automotive sector current deferred income tax assets	2,085	1,791
Automotive sector non-current deferred income tax assets	12,829	13,932
Sector balance sheet presentation of deferred income tax liabilities [Abstract]
Automotive sector current deferred income tax liabilities	26	40
Automotive sector non-current deferred income tax liabilities	134	255
Financial Services [Member]
Sector balance sheet presentation of deferred income tax liabilities [Abstract]
Deferred income tax liabilities	1,588	1,301
Financial Services [Member] | Other assets [Member]
Sector balance sheet presentation of deferred income tax assets [Abstract]
Deferred income tax assets	303	302
Intersector Eliminations [Member]
Sector balance sheet presentation of deferred income tax assets [Abstract]
Deferred income tax assets	(1,153)	(900)
Sector balance sheet presentation of deferred income tax liabilities [Abstract]
Deferred income tax liabilities	$ (1,153)	$ (900)