Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Leases [Abstract]
Operating cash flows for operating leases	$ 384	$ 346
Operating cash flows for finance leases	10	11
Financing cash flows for finance leases	23	84
Operating lease right-of-use assets obtained in exchange for new operating lease liabilities	104	381
Right-of-use assets obtained in exchange for new finance lease liabilities	$ 8	$ 70