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Property and Equipment - Schedule of Property and Equipment (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Property, Plant and Equipment    
Property and equipment, gross $ 2,520 $ 2,292
Accumulated depreciation and amortization (1,571) (1,405)
Total Property and equipment, net 949 887
Land    
Property, Plant and Equipment    
Property and equipment, gross 46 48
Buildings    
Property, Plant and Equipment    
Property and equipment, gross 397 295
Leasehold improvements    
Property, Plant and Equipment    
Property and equipment, gross 162 157
Computer equipment    
Property, Plant and Equipment    
Property and equipment, gross 1,754 1,622
Furniture, fixtures, and other equipment    
Property, Plant and Equipment    
Property and equipment, gross $ 161 $ 170