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Derivatives - Derivatives Presented on a Net Asset and Net Liability basis (Details) - Interest rate swaps - USD ($)
$ in Millions
Mar. 31, 2022
Dec. 31, 2021
Assets    
Gross Amounts on Balance Sheet $ 78.1 $ 25.1
Effects of Counterparty Netting (69.4) (25.1)
Net Amounts 8.7 0.0
Liabilities    
Gross Amounts on Balance Sheet 69.4 78.7
Effects of Counterparty Netting (69.4) (25.1)
Net Amounts $ 0.0 $ 53.6