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Goodwill and Other Intangible Assets, Amortization (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Intangible assets
Amortization expense	$ 86.0	$ 81.0	$ 86.4
Amortization expense estimated for each of the next five fiscal years
2024	93.0
2025	68.9
2026	67.3
2027	60.5
2028	53.2
2021 Acquisitions [Member] \| Backlog
Intangible assets
Amortization expense			$ 25.2
2022 Acquisitions [Member] \| Backlog
Intangible assets
Amortization expense		$ 12.0
2023 Acquisitions [Member] \| Backlog
Intangible assets
Amortization expense	$ 12.4