Goodwill and Other Intangible Assets, Amortization (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Intangible assets
Amortization expense	$ 18.1	$ 16.8	$ 41.2	$ 34.8
Amortization expense estimated for each of the next five fiscal years
Remainder of 2023	36.0		36.0
2024	66.6		66.6
2025	57.1		57.1
2026	55.5		55.5
2027	48.8		48.8
2028	$ 41.5		41.5
2023 Acquisitions [Member] \| Backlog
Intangible assets
Amortization expense			$ 5.4

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Amount of amortization for assets, excluding financial assets and goodwill, lacking physical substance with finite life expected to be recognized in third fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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