Accrued Liabilities and Deferred Revenue (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Liabilities, Noncurrent [Abstract]
Accrued liabilities and deferred revenue	$ 49,407	$ 45,369
Automotive [Member]
Liabilities, Current [Abstract]
Dealer and Customer Allowance and Claims	6,779	6,694
Deferred revenue	2,796	2,216
Employee benefit plans	1,504	1,552
Accrued interest	277	253
Other postretirement employee benefits	409	439
Pension	387	388
Other	3,206	3,461
Total Automotive accrued liabilities and deferred revenue	15,358	15,003
Liabilities, Noncurrent [Abstract]
Pension	18,400	15,091
OPEB	6,398	6,152
Dealer and Customer Allowances and Claims	2,036	2,179
Deferred revenue	1,893	1,739
Employee benefit plans	767	709
Other	1,055	1,040
Total Automotive other liabilities	30,549	26,910
Accrued liabilities and deferred revenue	45,907	41,913
Financial Services [Member]
Liabilities, Noncurrent [Abstract]
Accrued liabilities and deferred revenue	3,500	3,457
Intersector [Member]
Liabilities, Noncurrent [Abstract]
Accrued liabilities and deferred revenue	49,407	45,370
Intersector Eliminations [Member]
Liabilities, Noncurrent [Abstract]
Accrued liabilities and deferred revenue	$ 0	$ (1)