Goodwill and Other Intangible Assets, Intangible Assets (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
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