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Leases - Lease Cost (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Leases [Abstract]        
Operating lease cost $ 34.9 $ 27.6 $ 66.3 $ 51.4
Amortization of ROU assets 5.4 2.9 10.2 5.2
Interest on lease liabilities 0.3 0.3 0.7 0.6
Sublease income (21.3) (18.6) (39.5) (32.0)
Net lease cost 19.3 12.2 37.7 25.2
Short-term lease, cost 17.4 13.7 32.7 22.5
Variable lease, cost $ 0.6 $ 0.8 $ 1.3 $ 2.5