Other Liabilities and Deferred Revenue Other Liabilities and Deferred Revenue (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Liabilities, Noncurrent [Abstract]
Other liabilities and deferred revenue	$ 43,577	$ 40,886
Automotive [Member]
Liabilities, Current [Abstract]
Dealer and dealers' customer allowances and claims	7,846	7,730
Deferred revenue	3,923	2,817
Employee benefit plans	1,994	1,706
Accrued interest	222	262
Other postretirement employee benefits	397	387
Pension	374	327
Other	3,178	3,308
Total Automotive other liabilities and deferred revenue	17,934	16,537
Liabilities, Noncurrent [Abstract]
Pension	9,721	9,288
OPEB	5,991	5,502
Dealer and dealers' customer allowances and claims	2,852	2,028
Deferred revenue	2,686	2,534
Employee benefit plans	1,149	1,213
Other	1,394	1,524
Total Automotive other liabilities	23,793	22,089
Other liabilities and deferred revenue	41,727	38,626
Financial Services [Member]
Liabilities, Noncurrent [Abstract]
Other liabilities and deferred revenue	$ 1,850	$ 2,260