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Derivative Instruments (Narrative) (Details) - USD ($)
$ in Millions
6 Months Ended 12 Months Ended
Jun. 30, 2022
Dec. 31, 2021
Derivative Instruments and Hedging Activities Disclosure [Abstract]    
Derivative collateral $ 200.0 $ 1,300.0
Credit risk, maximum exposure $ 2.0 $ 8.5
Call Options    
Derivative [Line Items]    
Derivative, term of contract 1 year