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Commitments and Contingencies - Lease Cost, Cash Flows and Other Supplemental Information - Operating Leases (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
Commitments and Contingencies Disclosure [Abstract]        
Operating lease cost $ 14.8 $ 14.0 $ 28.9 $ 28.0
Sublease income (1.4) (1.4) (2.9) (2.9)
Total operating lease cost 13.4 12.6 26.0 25.1
Cash paid for amounts included in the measurement of operating lease liabilities $ 17.1 $ 16.0 $ 34.2 $ 32.0
Weighted-average remaining lease term 11 years 11 years 7 months 6 days 11 years 11 years 7 months 6 days
Weighted-average discount rate 4.28% 4.10% 4.28% 4.10%