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Financial Instruments (Realized Gains and Losses) (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]    
Proceeds from sales $ 27.6 $ 35.2
Realized gross gains on sales 0.2 0.1
Realized gross losses on sales $ 0.7 $ 0.8