v3.25.4
Asset Retirement Obligations (Tables)
12 Months Ended
Dec. 31, 2025
Asset Retirement Obligation [Abstract]  
Schedule of Asset Retirement Obligations
Changes in our liability for asset retirement obligations for the years 2025 and 2024 are presented in the table below:
(in millions)20252024
Beginning Balance$783.2 $553.0 
Accretion recorded as a regulatory asset/liability38.0 25.3 
Additions63.3 189.9 
Settlements(73.0)(72.5)
Change in estimated cash flows25.4 87.5 
Ending Balance$836.9 $783.2