Presentation - Reconciliations between Consolidated and Sector Deferred Taxes (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Sector balance sheet presentation of deferred income tax assets [Abstract]
Deferred income tax assets	$ 15,185	$ 15,125
Sector balance sheet presentation of deferred income tax liabilities [Abstract]
Deferred income tax liabilities	470	696
Automotive [Member]
Sector balance sheet presentation of deferred income tax assets [Abstract]
Automotive sector current deferred income tax assets	3,488	1,791
Automotive sector non-current deferred income tax assets	13,325	13,932
Sector balance sheet presentation of deferred income tax liabilities [Abstract]
Automotive sector current deferred income tax liabilities	81	40
Automotive sector non-current deferred income tax liabilities	514	255
Financial Services [Member]
Sector balance sheet presentation of deferred income tax liabilities [Abstract]
Deferred income tax liabilities	1,687	1,301
Financial Services [Member] | Other assets [Member]
Sector balance sheet presentation of deferred income tax assets [Abstract]
Deferred income tax assets	184	302
Intersector [Member]
Sector balance sheet presentation of deferred income tax assets [Abstract]
Deferred income tax assets	16,997	16,025
Sector balance sheet presentation of deferred income tax liabilities [Abstract]
Deferred income tax liabilities	2,282	1,596
Intersector Eliminations [Member]
Sector balance sheet presentation of deferred income tax assets [Abstract]
Deferred income tax assets	(1,812)	(900)
Sector balance sheet presentation of deferred income tax liabilities [Abstract]
Deferred income tax liabilities	$ (1,812)	$ (900)