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Offsetting of Assets and Liabilities - Narrative (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Derivative [Line Items]    
Gross amounts not offset in the balance sheet, received from $ 2.8 $ 0.9
Gross amounts not offset in the balance sheet, deposited 0.0 0.5
Aggregate fair value of all derivative instruments with credit-risk-related contingent features that are in a liability position 111.5 1,648.2
Collateral deposited with derivative counterparties for derivatives instruments with credit-risk-related contingent features that are in a liability position 84.2 1,044.0
Assets needed for immediate settlement, aggregate fair value 27.3 604.2
Net Investment Hedges    
Derivative [Line Items]    
Gross amounts not offset in the balance sheet, received from 93.5  
Gross amounts not offset in the balance sheet, deposited $ 43.4  
Cash collateral received from derivative counterparties not offset against derivative assets   111.0
Cash collateral deposited with derivative counterparties not offset against derivative liabilities   $ 49.0