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Leases - Lease Cost (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Leases [Abstract]        
Operating lease cost $ 3,593 $ 3,057 $ 10,259 $ 8,807
Finance lease cost:        
Amortization of lease assets 813 1,040 2,513 2,929
Interest on lease liabilities 81 70 224 215
Finance lease cost 894 1,110 2,737 3,144
Variable lease cost 637 605 1,992 1,832
Total lease cost $ 5,124 $ 4,772 $ 14,988 $ 13,783