Investment in ATC and ATC Holdco (Details-3) - ATC [Member] - Affiliated Entity [Member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Receivables [Abstract]
Other Receivables	$ 0.5		$ 0.5		$ 2.0
Operating Costs and Expenses [Abstract]
Operating Costs and Expenses, Total	$ 10.2	$ 9.1	$ 20.4	$ 18.2