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Transactions with Affiliates (Details)
$ in Thousands
1 Months Ended 3 Months Ended
Sep. 30, 2023
Apr. 30, 2024
USD ($)
Mar. 31, 2024
USD ($)
employee
Mar. 31, 2023
USD ($)
Dec. 31, 2023
USD ($)
Related Party Transaction [Line Items]          
Related party transaction, rate 5.20%        
Entity number of employees | employee     0    
Related party transaction, expenses from transactions with related party     $ 60,795 $ 59,298  
Cash distributions to parent     33,000 35,800  
Related Party [Member]          
Related Party Transaction [Line Items]          
Advances to affiliate     169,050   $ 157,776
Williams Companies Inc          
Related Party Transaction [Line Items]          
Advances to affiliate     169,100   $ 157,800
Interest Income, Other     1,900 2,400  
Related party transaction, expenses from transactions with related party     $ 22,300 $ 22,100  
Subsequent Event          
Related Party Transaction [Line Items]          
Cash distributions to parent   $ 42,500