Income Taxes (Effective and Statutory Rate Reconciliation) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Entity Information [Line Items]
Non-cash capital contribution		$ 200,000,000.0	$ 239,000,000.0
Statutory Federal tax rate	21.00%	21.00%	21.00%
State taxes, net of Federal tax benefit	7.30%	5.20%	2.50%
Depreciation of flow-through differences	1.70%	(4.50%)	(0.20%)
Disregarded single-member LLCs not allocated income tax expense	$ 0.050
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Depreciation and Amortization, Percent		(50.40%)	(7.60%)
Effective Income Tax Rate Reconciliation, Tax Credit, Percent		(0.10%)	0.00%
Other, net	6.00%	1.00%	(0.10%)
Effective tax rate	41.00%	(27.80%)	15.60%
Federal income tax	$ 11,700,000
State income taxes, net of federal effect	4,100,000
Effective Income Tax Rate Reconciliation, Depreciation of Allowance for Funds Used During Construction, Amount	1,000,000.0
Disregarded single-member LLCs not allocated income tax expense amount	2,800,000
Other, net	3,300,000
Effective Income Tax Rate Reconciliation, Amount	$ 22,900,000