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Equity Incentive Programs - Equity Incentive Compensation Expense (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total equity incentive compensation expense	$ 1.3	$ 1.5	$ 5.1	$ 5.9
Estimated future compensation expense	8.2		8.2
Estimated Future Expense in 2023
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated future compensation expense	1.5		1.5
Estimated Future Expense in 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated future compensation expense	4.2		4.2
Estimated Future Expense in 2025
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated future compensation expense	2.2		2.2
Estimated Future Expense in 2026
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Estimated future compensation expense	0.3		0.3
Restricted Stock and Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	1.3	1.5	4.1	4.8
Deferred Stock Units (DSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense	$ 0.0	$ 0.0	$ 1.0	$ 1.1

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