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Derivatives and Hedging Activities - Hedges and Credit Risk (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Cash Flow Hedges          
Expected net amount related to cash flow hedges in AOCI that will be reclassified to earnings as a reduction to interest and debt expense within next twelve months     $ 1.0    
Longest period of time over which the entity hedges exposure to the variability in future cash flows     13 years    
Net Investment Hedges          
Gain (loss) on net investment hedges recognized in OCI $ 8.0 $ 0.7 $ 22.0 $ (0.2)  
Credit Risk          
Aggregate fair value of derivative contracts in net liability position containing credit contingent provisions 364.0   364.0   $ 383.0
Aggregate fair value of assets posted as collateral 342.0   342.0   383.0
Aggregate fair value of additional assets required to be posted or needed to settle $ 22.0   $ 22.0   $ 0.0