v3.25.2
Components of Accrued Revenue (Detail) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Jun. 30, 2024
Deferred Revenue Arrangement [Line Items]      
Regulatory Assets, Current [1] $ 52.6 $ 70.1 $ 61.1
Total Accrued Revenue 56.8 77.4 65.9
Unbilled Revenues      
Deferred Revenue Arrangement [Line Items]      
Regulatory Assets, Current 4.2 7.3 4.8
Regulatory Assets      
Deferred Revenue Arrangement [Line Items]      
Regulatory Assets, Current $ 52.6 $ 70.1 $ 61.1
[1] Reflects amounts included in the Accrued Revenue on the Company’s Consolidated Balance Sheets.