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Product Warranty and Related Liabilities (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Product Warranty and Related Liabilities    
Warranty balance at beginning of period $ 10,571 $ 9,295
Warranties issued and assumed in period – recall campaigns 143 266
Warranties issued and assumed in period – product warranty 789 668
Payments (1,203) (1,024)
Adjustments to pre-existing warranties 565 174
Effect of foreign currency and other 8 (24)
Warranty balance at end of period 10,873 9,356
Less: Supplier recoveries balance at end of period 408 630
Warranty balance, net of supplier recoveries at end of period 10,465 8,726
Product Warranty Expense, Net of Recoveries    
Warranties issued and assumed in period 932 934
Supplier recoveries accrued in period (151) (58)
Adjustments and other 573 150
Warranty expense, net of supplier recoveries $ 1,354 $ 1,026