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Pension - Schedule of Net Periodic Benefit Cost (Details) - Pension Benefits - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Defined Benefit Plan Disclosure        
Service cost $ 0.2 $ 0.4 $ 0.5 $ 1.1
Interest cost 3.4 2.5 10.2 7.4
Expected return on plan assets (3.4) (3.3) (10.3) (9.9)
Amortization of net loss 0.3 0.1 1.1 0.4
Net periodic benefit cost (benefit) $ 0.5 $ (0.3) $ 1.5 $ (1.0)