v3.26.1
Regulation and Rates - Purchased Gas Adjustment Mechanism (Details) - Subsidiaries
$ in Millions
Nov. 01, 2025
USD ($)
Purchased Gas Adjustment  
Regulation and Rates [Line Items]  
Public Utilities, Approved Rate Increase (Decrease), Amount $ (55.1)
Purchased Gas Adjustment, Schedule 101  
Regulation and Rates [Line Items]  
Public Utilities, Approved Rate Increase (Decrease), Amount (7.9)
purchased gas adjustment, Schedule 106 106B  
Regulation and Rates [Line Items]  
Public Utilities, Approved Rate Increase (Decrease), Amount $ (47.2)