v3.26.1
Variable Interest Entities (Schedule of VIE Assets and Liabilities) (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Variable Interest Entity [Line Items]    
Public Utilities, Property, Plant and Equipment, Net [1] $ 30,521.3 $ 28,688.2
Current assets [1] 2,199.4 2,377.2
Other Assets, Noncurrent 4,529.9 4,520.5
Total Assets 37,543.6 35,858.7
Current liabilities [2] 4,414.5 3,457.4
Asset retirement obligations 811.8 781.9
Finance lease obligations 381.5 258.0
Variable Interest Entity, Primary Beneficiary    
Variable Interest Entity [Line Items]    
Finance Lease, Liability, Payment, Due 40.0 40.1
Variable Interest Entity Primary Beneficiary Member GenCo    
Variable Interest Entity [Line Items]    
Other Assets 210.7 305.4
Consolidated Variable Interest Entities    
Variable Interest Entity [Line Items]    
Public Utilities, Property, Plant and Equipment, Net 1,233.9 1,273.0
Current assets 49.1 27.6
Total Assets 1,283.0 1,300.6
Current liabilities 13.1 16.1
Asset retirement obligations 57.0 55.7
Total Liabilities $ 110.1 $ 111.9
[1] Includes $1,764.0 million and $1,312.7 million at June 30, 2026 and December 31, 2025, respectively, of net property, plant and equipment assets and $223.4 million and $90.1 million at June 30, 2026 and December 31, 2025, respectively, of current assets of consolidated VIEs that may be used only to settle obligations of the consolidated VIEs. Refer to Note 4, "Noncontrolling Interests," for additional information.
(2)Includes $210.7 million and $305.4 million at June 30, 2026 and December 31, 2025, respectively, of advanced deposits of project costs and $10.0 million and zero, respectively, of regulatory assets at June 30, 2026 and December 31, 2025, respectively, of consolidated VIEs that may be used only to settle obligations of the consolidated VIEs. Refer to Note 4, "Noncontrolling Interests," for additional information.
[2] Includes $335.6 million and $56.9 million at June 30, 2026 and December 31, 2025, respectively, of current liabilities and $57.0 million and $55.7 million at June 30, 2026 and December 31, 2025, respectively, of other liabilities, and finance leases of $40.0 million and $40.1 million at June 30, 2026 and December 31, 2025, respectively, of consolidated VIEs that creditors do not have recourse to our general credit. Refer to Note 4, "Noncontrolling Interests," for additional information.