Presentation - Reconciliations between Consolidated and Sector Deferred Taxes (Details) - USD ($) $ in Millions	Jun. 30, 2015	Dec. 31, 2014
Sector balance sheet presentation of deferred income tax assets [Abstract]
Deferred income tax assets	$ 12,497	$ 13,639
Sector balance sheet presentation of deferred income tax liabilities [Abstract]
Deferred income tax liabilities	578	570
Automotive [Member]
Sector balance sheet presentation of deferred income tax assets [Abstract]
Automotive sector current deferred income tax assets	2,779	2,039
Automotive sector non-current deferred income tax assets	12,151	13,331
Sector balance sheet presentation of deferred income tax liabilities [Abstract]
Automotive sector current deferred income tax liabilities	334	270
Automotive sector non-current deferred income tax liabilities	301	367
Financial Services [Member]
Sector balance sheet presentation of deferred income tax liabilities [Abstract]
Deferred income tax liabilities	2,553	1,849
Financial Services [Member] | Other assets [Member]
Sector balance sheet presentation of deferred income tax assets [Abstract]
Deferred income tax assets	177	185
Intersector [Member]
Sector balance sheet presentation of deferred income tax assets [Abstract]
Deferred income tax assets	15,107	15,555
Sector balance sheet presentation of deferred income tax liabilities [Abstract]
Deferred income tax liabilities	3,188	2,486
Intersector Eliminations [Member]
Sector balance sheet presentation of deferred income tax assets [Abstract]
Deferred income tax assets	(2,610)	(1,916)
Sector balance sheet presentation of deferred income tax liabilities [Abstract]
Deferred income tax liabilities	$ (2,610)	$ (1,916)