Accrued Liabilities and Deferred Revenue (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Liabilities, Noncurrent [Abstract]
Accrued liabilities Current And Noncurrent And Deferred Revenue	$ 44,714	$ 45,369
Automotive [Member]
Liabilities, Current [Abstract]
Dealer and Customer Allowance and Claims	6,993	6,971
Deferred Revenue, Current	2,494	2,216
Deferred Compensation Liability, Current	1,590	1,552
Interest Payable, Current	271	253
Other Postretirement Defined Benefit Plan Liabilities Current	440	439
Defined Benefit Pension Plan Liabilities, Current	386	388
Other Liabilities, Current	2,985	3,184
Accrued liabilities and deferred revenue current	15,159	15,003
Liabilities, Noncurrent [Abstract]
Defined Benefit Pension Plan, Liabilities, Noncurrent	14,243	15,091
Other Postretirement Defined Benefit Plan, Liabilities, Noncurrent	6,187	6,152
Dealer and Customer Allowances and Claims Noncurrent	2,478	2,453
Deferred Revenue, Noncurrent	1,832	1,739
Deferred Compensation Liability, Classified, Noncurrent	612	709
Other Accrued Liabilities, Noncurrent	767	766
Accrued Liabilities and Deferred Revenue Noncurrent	(26,119)	(26,910)
Accrued liabilities Current And Noncurrent And Deferred Revenue	41,278	41,913
Financial Services [Member]
Liabilities, Noncurrent [Abstract]
Accrued liabilities Current And Noncurrent And Deferred Revenue	3,436	3,457
Intersector [Member]
Liabilities, Noncurrent [Abstract]
Accrued liabilities Current And Noncurrent And Deferred Revenue	44,714	45,370
Intersector Eliminations [Member]
Liabilities, Noncurrent [Abstract]
Accrued liabilities Current And Noncurrent And Deferred Revenue	$ 0	$ (1)