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Related Party Transactions - Other Agreements (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2023
Jun. 30, 2022
Jun. 30, 2023
Jun. 30, 2022
DPG Management Agreement, Operating Service And Construction Fee Paid To Partnership | Affiliated Entity        
Related Party Transaction [Line Items]        
Fees paid to the Partnership $ 0.4 $ 0.4 $ 0.8 $ 0.8