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Goodwill and Other Intangible Assets, Amortization (Details) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 USD ($) | Mar. 31, 2023 USD ($) | Dec. 31, 2023 agreement
Intangible assets |  |  |
Amortization expense | $ 20.4 | $ 23.2 |
Amortization expense estimated for each of the next five fiscal years |  |  |
Remainder of 2024 | 57.6 |  |
2025 | 68.2 |  |
2026 | 66.6 |  |
2027 | 59.9 |  |
2028 | 52.5 |  |
2029 | $ 41.9 |  |
2023 Acquisitions [Member] |  |  |
Intangible assets |  |  |
Number of acquisitions | agreement |  |  | 10
2023 Acquisitions [Member] | Backlog |  |  |
Intangible assets |  |  |
Amortization expense |  | $ 5.4 |

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