Leases - Supplemental Cash Flows (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows for operating leases	$ 427	$ 461
Operating cash flows for finance leases	11	12
Financing cash flows for finance leases	17	25
Supplemental lease cash flow disclosures:
Operating lease right-of-use assets obtained in exchange for new operating lease liabilities	191	143
Right-of-use assets obtained in exchange for new finance lease liabilities	$ 2	$ 10