v3.25.2
ACQUISITIONS AND DISPOSITIONS - Narrative (Details)
$ in Millions
1 Months Ended 3 Months Ended 6 Months Ended
Jun. 30, 2025
USD ($)
facility
Feb. 29, 2024
USD ($)
Jun. 30, 2025
USD ($)
facility
Jun. 30, 2025
USD ($)
facility
Jun. 30, 2024
USD ($)
May 31, 2025
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Proceeds from noncontrolling interests, net       $ 2,782.9 $ 0.0  
NMRD | Disposal Group, Disposed of by Sale, Not Discontinued Operations            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Proceeds from divestiture of businesses   $ 107.0        
Ohio Transmission And Indiana Michigan Transmission            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Subsidiary, ownership percentage, parent 19.90%   19.90% 19.90%    
Proceeds from noncontrolling interests, gross $ 2,820.0          
Proceeds from noncontrolling interests, net 2,780.0          
Capital plan, amount $ 54,000.0   $ 54,000.0 $ 54,000.0    
VIU | Pixley | PSO            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Percentage of shares acquired           100.00%
VIU | Flat Ridge IV | PSO            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Percentage of shares acquired 100.00%   100.00% 100.00%    
VIU | Green Country | PSO            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Percentage of shares acquired 100.00%   100.00% 100.00%    
Asset acquisition, property, plant and equipment $ 819.0   $ 819.0 $ 819.0    
Asset acquisition, intangible liability 41.0   41.0 41.0    
Asset acquisition, regulatory liability $ 50.0   $ 50.0 $ 50.0    
Three Electric Generation Facilities | VIU | PSO            
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]            
Number of properties | facility 3   3 3    
Payments to acquire plant     $ 1,400.0