Presentation - Reconciliations between Consolidated and Sector Deferred Taxes (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Sector balance sheet presentation of deferred income tax assets [Abstract]
Deferred income tax assets	$ 13,694	$ 15,185
Sector balance sheet presentation of deferred income tax liabilities [Abstract]
Deferred income tax liabilities	676	470
Automotive [Member]
Sector balance sheet presentation of deferred income tax assets [Abstract]
Automotive sector current deferred income tax assets	3,107	3,488
Automotive sector non-current deferred income tax assets	12,108	13,325
Sector balance sheet presentation of deferred income tax liabilities [Abstract]
Automotive sector current deferred income tax liabilities	265	81
Automotive sector non-current deferred income tax liabilities	387	514
Financial Services [Member]
Sector balance sheet presentation of deferred income tax liabilities [Abstract]
Deferred income tax liabilities	1,713	1,687
Financial Services [Member] | Other assets [Member]
Sector balance sheet presentation of deferred income tax assets [Abstract]
Deferred income tax assets	168	184
Intersector [Member]
Sector balance sheet presentation of deferred income tax assets [Abstract]
Deferred income tax assets	15,383	16,997
Sector balance sheet presentation of deferred income tax liabilities [Abstract]
Deferred income tax liabilities	2,365	2,282
Intersector Eliminations [Member]
Sector balance sheet presentation of deferred income tax assets [Abstract]
Deferred income tax assets	(1,689)	(1,812)
Sector balance sheet presentation of deferred income tax liabilities [Abstract]
Deferred income tax liabilities	$ (1,689)	$ (1,812)