Presentation - Reconciliations between Consolidated and Sector Balance Sheets (Details) (USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Balance sheet presentation of deferred income tax assets: [Abstract]
Deferred income tax assets	$ 2,103	$ 2,003
Balance sheet presentation of deferred income tax liabilities: [Abstract]
Deferred income tax liabilities	1,371	1,135
Automotive [Member]
Balance sheet presentation of deferred income tax assets: [Abstract]
Automotive sector current deferred income tax assets	306	359
Automotive sector non-current deferred income tax assets	2,340	2,468
Balance sheet presentation of deferred income tax liabilities: [Abstract]
Automotive sector current deferred income tax liabilities	244	392
Automotive sector non-current deferred income tax liabilities	300	344
Financial Services [Member]
Balance sheet presentation of deferred income tax liabilities: [Abstract]
Deferred income tax liabilities	1,585	1,505
Financial Services [Member] | Other assets
Balance sheet presentation of deferred income tax assets: [Abstract]
Deferred income tax assets	215	282
Intersector [Member]
Balance sheet presentation of deferred income tax assets: [Abstract]
Deferred income tax assets	2,861	3,109
Reclassification for netting of deferred income taxes	(758)	(1,106)
Balance sheet presentation of deferred income tax liabilities: [Abstract]
Deferred income tax liabilities	2,129	2,241
Reclassification for netting of deferred income taxes	$ (758)	$ (1,106)