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Property and Equipment
 6 Months Ended
Jun. 30, 2022
Property, Plant and Equipment [Abstract]  
Property and Equipment Property and Equipment
 
Property and equipment, net consists of the following (in millions):
 June 30, 2022December 31, 2021
Computer equipment$1,402 $1,226 
Computer software75 77 
Leasehold and other improvements214 200 
Furniture and fixtures78 74 
Construction in progress8 14 
Property and equipment, gross1,777 1,591 
Less: Accumulated depreciation(901)(825)
Property and equipment, net$876 $766 
Construction in progress consists primarily of leasehold and other improvements and in-process software development costs. Depreciation expense for the three months ended June 30, 2022 and 2021 was $61 million and $78 million, respectively, and for the six months ended June 30, 2022 and 2021 was $119 million and $149 million, respectively