Property and Equipment - Summary of Property and Equipment (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 8,735	$ 8,329
Accumulated depreciation and amortization	(4,056)	(3,677)
Property and equipment, net	4,679	4,652
Computer software, purchased and internally developed
Property, Plant and Equipment [Line Items]
Property and equipment, gross	7,068	6,617
Computer equipment, furniture and other equipment
Property, Plant and Equipment [Line Items]
Property and equipment, gross	986	940
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	665	744
Building and improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	15	27
Land and improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross	$ 1	$ 1