v3.25.2
Summary of Significant Accounting Policies - Additional Information (Details)
$ in Millions
3 Months Ended 9 Months Ended
Dec. 31, 2023
USD ($)
Jun. 30, 2025
USD ($)
Segment
Sep. 30, 2024
USD ($)
Jun. 30, 2024
USD ($)
Accounting Policies [Line Items]        
Number of reportable segments | Segment   3    
Restricted cash   $ 35.0 $ 30.4 $ 26.3
MoGas Pipeline [Member]        
Accounting Policies [Line Items]        
Payments to acquire businesses, gross   $ 176.1    
Other Income [Member]        
Accounting Policies [Line Items]        
Gain on discontinuation of cash flow hdge due to forecasted transaction probable of not occurring $ 8.2