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Certain Provisions of the Partnership Agreement - Summary of Distribution (Details) - Series B Preferred Units - Limited Partner - USD ($)
$ in Millions
1 Months Ended 3 Months Ended
May 13, 2022
Feb. 11, 2022
Jan. 31, 2022
Dec. 31, 2021
Dec. 31, 2022
Sep. 30, 2022
Jun. 30, 2022
Mar. 31, 2022
Dec. 31, 2021
Sep. 30, 2021
Jun. 30, 2021
Mar. 31, 2021
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Partnership agreement                                
Preferred units distributions (in shares)         0 0 0 0 0 151,626 151,248 150,871 150,494 150,119 149,745 149,371
Cash distribution (in millions)         $ 17.3 $ 17.3 $ 17.3 $ 17.5 $ 19.2 $ 17.1 $ 17.0 $ 17.0 $ 16.9 $ 16.9 $ 16.8 $ 16.8
Distribution, Tranche One                                
Partnership agreement                                
Dividends, preferred stock   $ 17.3 $ 1.0 $ 0.9                        
Distribution, Tranche Two                                
Partnership agreement                                
Dividends, preferred stock $ 17.2   $ 0.3