Other Liabilities and Deferred Revenue (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Other Liabilities, Current [Abstract]
Dealer and dealers’ customer allowances and claims	$ 8,300	$ 12,702
Deferred revenue	2,349	2,161
Employee benefit plans	1,687	1,752
Accrued interest	888	1,215
OPEB	332	339
Pension	202	193
Operating lease liabilities	345	323
Other	4,583	4,960
Total current other liabilities and deferred revenue	18,686	23,645
Other Liabilities, Noncurrent [Abstract]
Pension	8,658	10,738
OPEB	5,708	6,236
Dealer and dealers’ customer allowances and claims	4,909	3,072
Deferred revenue	4,683	4,559
Operating lease liabilities	1,048	991
Employee benefit plans	1,007	1,074
Other	1,692	1,709
Total non-current other liabilities and deferred revenue	$ 27,705	$ 28,379