Other Liabilities and Deferred Revenue (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Liabilities, Noncurrent [Abstract]
Other liabilities and deferred revenue	$ 41,644	$ 43,577
Automotive [Member]
Liabilities, Current [Abstract]
Dealer and dealers' customer allowances and claims	7,388	7,846
Deferred revenue	4,301	3,923
Employee benefit plans	1,328	1,994
Accrued interest	159	222
Other postretirement employee benefits	379	397
Pension	345	374
Other	2,845	3,178
Total Automotive other liabilities and deferred revenue	16,745	17,934
Liabilities, Noncurrent [Abstract]
Pension	9,049	9,721
OPEB	5,810	5,991
Dealer and dealers' customer allowances and claims	2,793	2,852
Deferred revenue	2,747	2,686
Employee benefit plans	1,142	1,149
Other	1,530	1,394
Total Automotive other liabilities	23,071	23,793
Other liabilities and deferred revenue	39,816	41,727
Financial Services [Member]
Liabilities, Noncurrent [Abstract]
Other liabilities and deferred revenue	$ 1,828	$ 1,850