Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023	Dec. 10, 2025
NET INCOME	$ 21.0	$ 13.8	$ 35.7
CASH FLOWS FROM OPERATING ACTIVITIES:
Net income (loss)	33.0	13.8	35.7
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	119.4	95.2	82.1
Amortization of deferred financing costs and debt discounts	3.0	3.5	3.8
Deferred income taxes	25.5	14.8	26.2
Gain (Loss) on Disposition of Business	0.0	1.3	0.0
Increase (Decrease) in Allowance for Equity Funds Used During Construction	0.4	6.2	5.0
Changes in certain assets and liabilities:
Accounts receivable, net	(54.4)	(14.3)	(0.6)
Inventories	0.2	(15.3)	(17.7)
Taxes applicable to subsequent years	(13.3)	(24.1)	(19.0)
Increase (Decrease) in Prepaid Expense and Other Assets	(1.6)	(0.4)	2.8
Non-current regulatory assets and liabilities, net	(12.4)	33.3	39.8
Increase (Decrease) in Other Regulatory Assets	5.7	19.1	(35.3)
Accounts payable	(22.2)	(21.0)	19.7
Accrued taxes payable / receivable	41.3	19.7	34.1
Accrued interest	(3.2)	(6.0)	(0.8)
Increase (Decrease) in Deferred Liabilities	(4.0)	(6.9)	2.2
Accrued pension and other postretirement obligations	(14.2)	7.0	4.1
Increase (Decrease) in Other Noncurrent Liabilities	3.9	(0.5)	(3.8)
Other	(0.6)	(0.7)	(0.7)
Net cash provided by operating activities	125.3	118.7	26.7
CASH FLOWS FROM INVESTING ACTIVITIES:
Capital expenditures	(387.2)	(549.5)	(387.9)
Proceeds from Contribution in Aid of Construction, Investing Activity	60.0	0.0	0.0
Payments for (Proceeds from) Removal Costs	(18.8)	(27.5)	(26.8)
Other investing activities, net	(0.6)	(0.5)	0.2
Net cash used in investing activities	(346.6)	(577.5)	(414.5)
Cash flows from financing activities:
Deferred financing costs	(4.5)
Retirement of debt	(415.0)	0.0	0.0
Equity Contribution from Parent	0.0	200.0	239.0
Premium paid for early redemption of debt		(3.2)	(0.7)
Issuance of long-term debt	375.0	0.0	300.0
Borrowings from revolving credit facilities	385.0	485.0	315.0
Repayment of borrowings from revolving credit facilities	(525.0)	(360.0)	(455.0)
Net cash from financing activities	250.2	471.8	398.3
Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation	28.9	13.0	10.5
Cash and cash equivalents:
Restricted Cash and Cash Equivalent	83.0	54.1	41.1
Supplemental cash flow information:
Interest paid, net of amounts capitalized	84.1	78.4	71.0
Non-cash financing and investing activities:
Accruals for capital expenditures	82.9	48.8	101.6
Non Cash Contribution from Noncontrolling interests		0.0	0.0	$ 8.6
Payments of Ordinary Dividends	8.6	0.0	0.0
Non-cash capital contribution		200.0	239.0
Increase (Decrease) in Other Noncurrent Assets	(5.2)	18.4	(5.3)
Proceeds from Short-Term Debt	0.0	150.0	0.0
Repayments of Short-Term Debt	(150.0)	0.0	0.0
Proceeds from Issuance of Redeemable Convertible Preferred Stock	539.7	0.0	0.0
Proceeds from Issuance of Common Stock	$ 45.0	$ 0.0	$ 0.0