Significant Accounting Policies - Property and Equipment (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 37,827	$ 36,440
Accumulated depreciation and amortization	(24,744)	(23,447)
Property and equipment, net	13,083	12,993
Land
Property, Plant and Equipment [Line Items]
Total property and equipment	1,809	1,847
Building and improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	4,593	4,632
Fixtures and equipment
Property, Plant and Equipment [Line Items]
Total property and equipment	11,737	11,716
Leasehold improvements
Property, Plant and Equipment [Line Items]
Total property and equipment	6,812	6,725
Software
Property, Plant and Equipment [Line Items]
Total property and equipment	$ 12,876	$ 11,520