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Equity Incentive Program - Stock Options and SSARs (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Share-based Compensation Arrangement by Share-based Payment Award
Share-based Payment Arrangement, Expense	$ 6.3	$ 5.9	$ 16.5	$ 11.0
Share-based Payment Arrangement, Expense, Tax Benefit	0.4	0.2	3.5	2.4
Share-Based Payment Arrangement, Expense, after Tax	5.9	5.7	13.0	8.6
Stock Options, Weighted Average Exercise Price
Disposal Group, Including Discontinued Operation, Share-Based Payment Arrangement, Expense		1.5		3.1
Share-based Payment Arrangement, Expense, Tax Benefit	0.4	$ 0.2	3.5	$ 2.4
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 0.0		$ 0.0
Stock Options, Number of Shares
Beginning balance			1,161,337
Expired			(148,769)
Ending balance	920,463		920,463
Exercisable	920,463		920,463
Stock Options, Weighted Average Exercise Price
Beginning balance			$ 17.59
Expired			18.54
Ending balance	$ 17.66		17.66
Exercisable	$ 17.66		17.66
Exercised (1)			$ 15.42
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period			(92,105)

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