Other Liabilities and Deferred Revenue (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Other Liabilities, Current [Abstract]
Dealer and dealers’ customer allowances and claims	$ 14,140	$ 12,910
Deferred revenue	3,331	2,515
Employee benefit plans	2,457	2,282
Accrued interest	1,346	1,224
OPEB	335	331
Pension	215	205
Operating lease liabilities	558	481
Other (a)	5,400	5,922
Total current other liabilities and deferred revenue	27,782	25,870
Other Liabilities, Noncurrent [Abstract]
Pension	4,470	6,383
OPEB	4,080	4,365
Deferred revenue	4,910	5,051
Dealer and dealers’ customer allowances and claims	9,836	7,506
Operating lease liabilities	1,782	1,395
Employee benefit plans	806	837
Other (a)	2,948	2,877
Total non-current other liabilities and deferred revenue	28,832	28,414
Derivative Liability, Current	1,000	1,000
Derivative Liability, Noncurrent	$ 900	$ 1,300
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
Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Total current other liabilities and deferred revenue	Total current other liabilities and deferred revenue
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Total non-current other liabilities and deferred revenue	Total non-current other liabilities and deferred revenue