Leases - Supplemental Balance Sheet Information (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Operating leases:
Operating lease right-of-use assets	$ 14,973	$ 15,944
Current portion of operating lease liabilities	1,737	1,751
Long-term operating lease liabilities	13,643	14,899
Total operating lease liabilities	15,380	16,650
Finance leases:
Property and equipment, gross	1,622	1,587
Accumulated depreciation	(528)	(447)
Property and equipment, net	$ 1,094	$ 1,140
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Property and equipment, net	Property and equipment, net
Current portion of long-term debt	$ 61	$ 65
Long-term debt	1,265	1,295
Total finance lease liabilities	$ 1,326	$ 1,360
Weighted average remaining lease term (in years)
Operating leases	10 years	10 years 8 months 12 days
Finance leases	15 years 8 months 12 days	16 years 6 months
Weighted average discount rate
Operating leases	4.70%	4.60%
Finance leases	5.10%	5.10%