Goodwill and Other Intangibles (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Other Intangible Assets
Acquired Finite-Lived Intangible Assets [Line Items]
Other intangible assets amortization	$ 2.4	$ 2.3	$ 7.1	$ 7.0
Estimated future amortization expense for the remainder of 2024	2.3		2.3
Estimated future amortization expense for 2025	9.0		9.0
Estimated future amortization expense for 2026	8.6		8.6
Estimated future amortization expense for 2027	8.4		8.4
Estimated future amortization expense for 2028	7.7		7.7
Computer Software
Acquired Finite-Lived Intangible Assets [Line Items]
Other intangible assets amortization	$ 153.1	$ 126.7	$ 444.1	$ 370.8

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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