Investment in ATC and ATC Holdco (Details-3) - ATC [Member] - Affiliated Entity [Member] - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Receivables [Abstract]
Other Receivables	$ 0.9		$ 0.9		$ 2.0
Operating Costs and Expenses [Abstract]
Operating Costs and Expenses, Total	$ 10.2	$ 9.1	$ 30.6	$ 27.3