Operating Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Leases [Abstract]
Operating lease right-of-use assets	$ 2,964	$ 2,484
Current maturities of operating leases	549	465
Long-term operating leases	2,440	2,034
Total lease liabilities	$ 2,989	$ 2,499
Weighted-average remaining lease term
Operating leases	9 years	8 years
Weighted-average discount rate
Operating leases	6.23%	5.39%