Other Liabilities and Deferred Revenue (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Derivative Liability, Current	$ 1,104	$ 535
Derivative Liability, Noncurrent	1,540	535
Accounts Payable and Accrued Liabilities, Current [Abstract]
Dealer and dealers’ customer allowances and claims	8,033	8,300
Deferred revenue	2,375	2,349
Employee benefit plans	1,418	1,687
Accrued interest	773	888
OPEB (a)	331	332
Pension (a)	199	202
Operating lease liabilities	352	345
Other (b)	5,414	4,583
Total current other liabilities and deferred revenue	18,895	18,686
Accounts Payable and Accrued Liabilities, Noncurrent [Abstract]
Pension (a)	7,910	8,658
OPEB (a)	5,590	5,708
Dealer and dealers’ customer allowances and claims	5,170	4,909
Deferred revenue	4,943	4,683
Operating lease liabilities	1,055	1,048
Employee benefit plans	982	1,007
Other (b)	2,571	1,692
Total non-current other liabilities and deferred revenue	28,221	27,705
Net pension assets	8,900	8,500
Derivative Liability, Current	1,104	535
Derivative Liability, Noncurrent	1,540	535
Other Current Liabilities
Derivative Liability, Current	705	97
Accounts Payable and Accrued Liabilities, Noncurrent [Abstract]
Derivative Liability, Current	705	97
Other Noncurrent Liabilities
Derivative Liability, Noncurrent	1,500	535
Accounts Payable and Accrued Liabilities, Noncurrent [Abstract]
Derivative Liability, Noncurrent	$ 1,500	$ 535