Accrued Liabilities and Deferred Revenue (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2013	Dec. 31, 2012
Accrued liabilities and deferred revenue	$ 47,167	$ 49,407
Automotive [Member]
Accrued liabilities and deferred revenue	43,614	45,907
Liabilities, Current [Abstract]
Dealer and dealers' customer allowances and claims	7,116	6,779
Deferred revenue	3,443	2,796
Employee benefit plans	1,510	1,504
Accrued interest	248	277
Other postretirement employee benefits	404	409
Pension	393	387
Other	2,854	3,206
Total Automotive accrued liabilities and deferred revenue	15,968	15,358
Liabilities, Noncurrent [Abstract]
Pension	14,609	18,400
OPEB	6,274	6,398
Dealer and dealers' customer allowances and claims	2,359	2,036
Deferred revenue	2,136	1,893
Employee benefit plans	666	767
Other	1,602	1,055
Total Automotive other liabilities	27,646	30,549
Financial Services [Member]
Accrued liabilities and deferred revenue	$ 3,553	$ 3,500