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Goodwill and Other Intangible Assets, Intangible Assets (Details) - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
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Intangible Assets |  |
Weighted average useful lives of amortizable intangible assets | 12 years |
Gross Carrying Amount (definite-lived) | $ 2,702.7 | $ 1,800.8
Accumulated Amortization | 989.5 | 844.8
Net Carrying Amount, (definite-lived) | 1,713.2 | 956.0
Indefinite-lived trade name intangible asset | 269.1 | 269.1
Intangible assets, gross (excluding goodwill) | 2,971.8 | 2,069.9
Net Carrying Amount, intangible assets | $ 1,982.3 | 1,225.1
Customer relationships |  |
Intangible Assets |  |
Weighted average useful lives of amortizable intangible assets | 12 years |
Gross Carrying Amount (definite-lived) | $ 1,560.0 | 1,296.4
Accumulated Amortization | 605.9 | 519.8
Net Carrying Amount, (definite-lived) | $ 954.1 | 776.6
Proprietary technology |  |
Intangible Assets |  |
Weighted average useful lives of amortizable intangible assets | 13 years |
Gross Carrying Amount (definite-lived) | $ 963.9 | 350.3
Accumulated Amortization | 214.1 | 170.9
Net Carrying Amount, (definite-lived) | $ 749.8 | 179.4
Backlog and other |  |
Intangible Assets |  |
Weighted average useful lives of amortizable intangible assets | 1 year |
Gross Carrying Amount (definite-lived) | $ 178.8 | 154.1
Accumulated Amortization | 169.5 | 154.1
Net Carrying Amount, (definite-lived) | $ 9.3 | $ 0.0

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