Other Liabilities and Deferred Revenue (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Accounts Payable and Accrued Liabilities, Current [Abstract]
Dealer and dealers’ customer allowances and claims	$ 7,806	$ 8,300
Contract with Customer, Liability, Current	2,312	2,349
Employee benefit plans	1,736	1,687
Accrued interest	795	888
OPEB (a)	327	332
Pension (a)	196	202
Operating lease liabilities	380	345
Other (b)	5,514	4,583
Total current other liabilities and deferred revenue	19,066	18,686
Accounts Payable and Accrued Liabilities, Noncurrent [Abstract]
Pension (a)	7,441	8,658
OPEB (a)	5,455	5,708
Dealer and dealers’ customer allowances and claims	5,466	4,909
Contract with Customer, Liability, Noncurrent	4,830	4,683
Operating lease liabilities	1,056	1,048
Employee benefit plans	962	1,007
Other (b)	3,381	1,692
Total non-current other liabilities and deferred revenue	28,591	27,705
Net pension assets	8,800	8,500
Derivative Liability, Current	1,300	97
Derivative Liability, Noncurrent	$ 2,300	$ 535
Derivative Liability, Current, Statement of Financial Position [Extensible Enumeration]	Total current other liabilities and deferred revenue	Total current other liabilities and deferred revenue
Derivative Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Total non-current other liabilities and deferred revenue	Total non-current other liabilities and deferred revenue