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Contingencies (Details)
item in Millions
1 Months Ended 6 Months Ended 30 Months Ended
Feb. 28, 2021
USD ($)
item
Sep. 30, 2021
USD ($)
item
Mar. 31, 2024
USD ($)
Mar. 31, 2021
USD ($)
Commitments And Contingencies [Line Items]        
Contingent liability   $ 20,000,000   $ 20,000,000
Deferred Tax Liabilities, Deferred Expense   $ 300,000    
SDG&E [Member]        
Commitments And Contingencies [Line Items]        
Number of people | item 3.6 3.6    
Asset Acquisition, Consideration Transferred $ 50,000,000.0      
Payments to Acquire Productive Assets $ 20,000,000.0      
Asset Acquisition, Contingent Consideration, Liability   $ 0    
Forecast [Member]        
Commitments And Contingencies [Line Items]        
Payments to Acquire Productive Assets     $ 30,000,000.0