Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows for operating leases	$ 303	$ 346	$ 398
Operating cash flows for finance leases	16	19	22
Financing cash flows for finance leases	78	83	85
Right-of-use assets obtained in exchange for lease obligations:
Right-of-use assets acquired under operating leases	$ 58	$ 327	$ 915