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Property and Equipment (Tables)
12 Months Ended
Dec. 31, 2024
Property, Plant and Equipment [Abstract]  
Summary of Property and Equipment
Property and equipment consists of the following (dollars in millions):
December 31,
Useful Lives20242023
Computer hardware and software
2-10 years
$1,489 $1,341 
Leasehold improvements
1-15 years
716 658 
Furniture and equipment
1-10 years
351 298 
Construction in progressN/A153 186 
Total cost2,709 2,483 
Accumulated depreciation and amortization1,795 1,576 
Property and equipment, net$914 $907