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PROPERTY, EQUIPMENT AND SOFTWARE | 12 Months Ended
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Dec. 31, 2023
Property, Plant and Equipment [Abstract] |
PROPERTY, EQUIPMENT AND SOFTWARE | PROPERTY, EQUIPMENT AND SOFTWARE. Property, equipment and software at December 31 consists of:
(in millions) | 2023 |  | 2022
Computer and communications software and equipment | $ | 1,497.3 |  |  | $ | 1,364.6 |
Buildings and improvements | 490.7 |  |  | 488.9 |
Leasehold improvements | 260.9 |  |  | 236.3 |
Furniture and other equipment | 207.8 |  |  | 209.7 |
Land | 25.7 |  |  | 25.7 |
| 2,482.4 |  |  | 2,325.2 |
Less accumulated depreciation and amortization | 1,675.8 |  |  | 1,569.5 |
Total | $ | 806.6 |  |  | $ | 755.7 |
Compensation and related costs attributable to the development of computer software for internal use, totaling $156.1 million in 2023, $134.6 million in 2022, and $137.6 million in 2021, have been capitalized.

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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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