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Leases - Cash Flow Information (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Cash paid for amounts included in the measurement of lease liabilities:        
Operating cash flows from operating leases $ (8.7) $ (8.1) $ (25.7) $ (25.2)
Supplemental non-cash information on lease liabilities arising from obtaining right-of-use assets:        
Right-of-use assets obtained in exchange for new operating lease liabilities $ 4.0 $ 5.4 $ 15.9 $ 15.5