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Leases (Supplemental Cash Flow Information) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Cash paid for amounts included in the measurement of lease liabilities:    
Operating cash flows from operating leases $ 57.0 $ 52.3
Operating cash flows from finance leases 0.1 0.2
Financing cash flows from finance leases 0.9 1.0
Leased assets obtained in exchange for lease obligations:    
Operating leases 54.8 65.5
Finance leases $ 1.1 $ 0.4