Goodwill and Other Intangibles (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Other Intangible Assets
Intangible Asset, Acquired, Finite-Lived [Line Items]
Estimated future amortization expense for the remainder of year	$ 2.4		$ 2.4
Estimated future amortization expense for year one	9.1		9.1
Estimated future amortization expense for year two	8.8		8.8
Estimated future amortization expense for year three	8.1		8.1
Estimated future amortization expense for year four	8.1		8.1
Other intangible assets amortization	2.4	$ 2.4	6.8	$ 7.1
Computer Software
Intangible Asset, Acquired, Finite-Lived [Line Items]
Other intangible assets amortization	$ 168.8	$ 153.1	$ 499.7	$ 444.1