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Derivative Instrument and Hedging Activities (Fair Values of Derivative Instruments on the Balance Sheet) (Parenthetical) (Details) - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 31, 2022
Interest Rate Swap [Member] | Derivatives Not Designated as Hedging Instruments [Member]    
Derivatives, Fair Value [Line Items]    
Obligations secured with cash $ 40.4 $ 54.3