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Pension - Net Periodic Benefit Cost (Details) - Pension Benefits - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Defined Benefit Plan Disclosure
Service cost	$ 0.0	$ 0.1	$ 0.2	$ 0.3
Interest cost	1.6	3.2	4.8	9.6
Expected return on plan assets	(1.5)	(3.5)	(4.3)	(10.6)
Amortization of net loss	0.6	0.4	1.8	1.2
Net periodic benefit cost	$ 0.7	$ 0.2	$ 2.5	$ 0.5

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