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Property and Equipment | 12 Months Ended
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Dec. 31, 2023
Property, Plant and Equipment [Abstract] |
Property and Equipment | Property and Equipment Property and equipment consists of the following (dollars in millions):
|  |  |  | December 31,
|  | Useful Lives |  | 2023 |  | 2022
Computer hardware and software |  | 2-10 years |  | $ | 1,341 |  |  | $ | 1,158 |
Leasehold improvements |  | 1-15 years |  | 658 |  |  | 611 |
Furniture and equipment |  | 1-10 years |  | 298 |  |  | 268 |
Construction in progress |  | N/A |  | 186 |  |  | 185 |
Total cost |  |  |  | 2,483 |  |  | 2,222 |
Accumulated depreciation and amortization |  |  |  | 1,576 |  |  | 1,386 |
Property and equipment, net |  |  |  | $ | 907 |  |  | $ | 836 |
Depreciation and amortization expense associated with property and equipment was $289.6 million, $260.8 million and $244.9 million for the years ended December 31, 2023, 2022 and 2021, respectively. There were no asset impairment charges related to property and equipment during the years ended December 31, 2023, 2022 and 2021. Construction in progress includes capitalizable costs incurred during the development stage of computer software and leasehold improvements that have not yet been placed in service.

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- Definition The entire disclosure for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 360 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//360/tableOfContent Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 6 -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480321/958-360-50-6 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (d) -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480321/958-360-50-1 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 7 -SubTopic 360 -Topic 958 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480321/958-360-50-7 + Details
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