v3.26.1
Condensed Consolidated Balance Sheets (Parenthetical) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Mar. 31, 2025
Dec. 31, 2024
Accounts Receivable, Allowance for Credit Loss, Current $ 11.9      
Cash and cash equivalents 69.9 $ 82.9    
Accounts Receivable, Allowance for Credit Loss 11.9 8.8 $ 8.1 $ 6.1
Accounts Receivable, after Allowance for Credit Loss, Current 166.1 161.1    
Inventories 68.0 70.3    
Taxes applicable to subsequent years 112.8 150.4    
Regulatory assets, current 53.8 61.1    
Income Taxes Receivable, Current 23.6 24.2    
Prepayments and other current assets 10.2 9.1    
Property, Plant, and Equipment, Accumulated Depreciation, Depletion, and Amortization (669.2) (647.3)    
Regulatory assets, non-current 128.2 137.4    
Intangible assets, net of amortization 166.8 166.9    
Other Assets, Noncurrent 23.6 31.8    
Liabilities, Current 401.3 377.5    
Current portion of long-term debt 30.2 0.2    
Accounts payable 126.6 144.0    
Accrued taxes 152.0 145.7    
Accrued interest 22.7 19.6    
Contract with Customer, Liability, Current 16.9 8.8    
Regulatory liabilities, current 1.2 1.8    
Other current liabilities 51.7 57.4    
Long-term debt 1,798.6 1,798.1    
Deferred Tax Liabilities, Net 245.0 233.0    
Taxes payable 75.6 150.9    
Regulatory liabilities, non-current 191.7 189.5    
Pension, retiree and other benefits 9.4 16.5    
Other deferred credits 7.3 7.9    
Other paid-in capital 3,049.3 3,049.3 3,040.5 3,040.5
Accumulated other comprehensive income 15.5 15.7 (5.3) (5.3)
Retained Earnings (Accumulated Deficit) (2,625.4) (2,652.1) (2,670.4) $ (2,673.1)
Equity, Attributable to Parent 439.4 412.9 $ 412.9  
Liabilities 2,728.9 2,773.4    
Commitments and contingencies    
Property, Plant, and Equipment, after Accumulated Depreciation, Depletion, and Amortization 2,950.5 2,885.8    
Liabilities and Equity $ 3,773.5 $ 3,781.0