v3.25.2
Subsequent Events - Additional Information (Details) - Subsequent Event [Member] - Piedmont Natural Gas Company [Member]
$ in Millions
Jul. 29, 2025
USD ($)
Subsequent Event [Line Items]  
Payments to acquire businesses, gross $ 2,480
Spire [Member]  
Subsequent Event [Line Items]  
Ownership percentage 100.00%