Leases - Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows paid for operating leases	$ 2,705	$ 2,733	$ 2,756
Operating cash flows paid for interest portion of finance leases	69	71	73
Financing cash flows paid for principal portion of finance leases	77	74	70
Right-of-use assets obtained in exchange for lease obligations:
Operating leases	785	852	1,132
Finance leases	$ 35	$ 30
Finance leases			$ (4)