v3.25.4
Income Taxes (Schedule Of Principal Components Of Net Deferred Tax Liability) (Details) - USD ($)
$ in Millions
Dec. 31, 2025
Dec. 31, 2024
Deferred Tax Liabilities    
Accelerated depreciation and other property differences $ 1,552.0 $ 1,419.4
Partnership basis differences 1,431.1 1,328.6
Other regulatory assets 210.3 210.1
Total Deferred Tax Liabilities 3,193.4 2,958.1
Deferred Tax Assets    
Other regulatory liabilities and deferred investment tax credits (including TCJA) 185.1 170.4
Pension and other postretirement/postemployment benefits 32.0 58.8
Net operating loss carryforward and AMT credit carryforward 326.0 369.4
Environmental liabilities 10.3 12.2
Other accrued liabilities 49.6 43.4
Deferred Tax Asset, Interest Carryforward 8.4 0.0
Deferred Tax Assets, Tax Credit Carryforwards, General Business 77.3 20.5
Other, net 19.4 8.2
Total Deferred Tax Assets 708.1 682.9
Deferred Tax Assets, Valuation Allowance (14.8) (6.4)
Deferred Tax Assets, Net of Valuation Allowance 693.3 676.5
Net Deferred Tax Liabilities $ 2,500.1 $ 2,281.6