Inventories (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Inventory Disclosure [Abstract]
Total productive material, supplies and work in process	$ 7,888	$ 7,422
Finished product, including service parts	9,437	9,039
Total inventories	17,325	16,461
Inventory [Line Items]
Inventory allowance	2,000	2,200
Electric Vehicle Inventory
Inventory [Line Items]
Inventory allowance	$ 1,500	$ 1,900