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Other Assets - Other Assets (Details) - USD ($)
$ in Millions
Jun. 30, 2022
Dec. 31, 2021
Other Assets    
Operating right-of-use lease assets $ 299.5 $ 255.3
Investments 241.3 127.6
Deferred compensation plan 113.5 133.5
Deferred contract costs and sales commissions 79.8 80.6
Reinsurance receivable 79.8 79.5
Derivative and hedging assets   19.7
Prepaid fees and capitalized implementation costs for cloud-based hosting arrangements 56.1 43.4
Amounts recoverable for capping, closure and post-closure obligations 20.1 19.4
Deferred financing costs 5.3 4.6
Other 35.1 24.0
Total $ 990.0 $ 787.6