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Transactions With Affiliates Transactions with Affiliates (Narrative) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
EWO Marketing, LLC [Member] | RS Cogen [Member]      
Related Party Transaction [Line Items]      
Intercompany operating expenses $ 24.0 $ 26.0 $ 24.5