Presentation - Reconciliations between Consolidated and Sector Deferred Taxes (Details) - USD ($) $ in Millions	Sep. 30, 2015	Dec. 31, 2014
Sector balance sheet presentation of deferred income tax assets [Abstract]
Deferred income tax assets	$ 11,434	$ 13,639
Sector balance sheet presentation of deferred income tax liabilities [Abstract]
Deferred income tax liabilities	529	570
Automotive [Member]
Sector balance sheet presentation of deferred income tax assets [Abstract]
Automotive sector current deferred income tax assets	2,885	2,039
Automotive sector non-current deferred income tax assets	11,453	13,331
Sector balance sheet presentation of deferred income tax liabilities [Abstract]
Automotive sector current deferred income tax liabilities	263	270
Automotive sector non-current deferred income tax liabilities	388	367
Financial Services [Member]
Sector balance sheet presentation of deferred income tax liabilities [Abstract]
Deferred income tax liabilities	2,946	1,849
Financial Services [Member] | Other assets [Member]
Sector balance sheet presentation of deferred income tax assets [Abstract]
Deferred income tax assets	164	185
Intersector [Member]
Sector balance sheet presentation of deferred income tax assets [Abstract]
Deferred income tax assets	14,502	15,555
Sector balance sheet presentation of deferred income tax liabilities [Abstract]
Deferred income tax liabilities	3,597	2,486
Intersector Eliminations [Member]
Sector balance sheet presentation of deferred income tax assets [Abstract]
Deferred income tax assets	(3,068)	(1,916)
Sector balance sheet presentation of deferred income tax liabilities [Abstract]
Deferred income tax liabilities	$ (3,068)	$ (1,916)