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Equity - Beneficiaries Customer ExAlt Trusts (Details) - Charitable Beneficiaries - USD ($)
$ in Millions
 6 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Class of Stock [Line Items]    
Percentage of distributions entitled to residual beneficiary, distributions received 2.50%  
Percent of distributions entitled to residual beneficiary, payments on amounts due 5.00%  
Percent of distributions entitled to residual beneficiary, amount of excess cash collateral 10.00%  
Issuance of shares in connection with standby equity purchase agreement $ 0.3 $ 0.0