Income Taxes (Details)		9 Months Ended
		Sep. 30, 2025	Sep. 30, 2024
Income Tax Disclosure [Abstract]
Federal statutory rate, percent		21.00%	21.00%
State tax (net of federal tax effect), percent		2.60%	2.00%
Wind PTCs, percent	[1]	(27.50%)	(28.80%)
Plant Regulatory Differences	[2]	(4.90%)	(4.40%)
Other tax credits, percent		0.20%	0.20%
Adjustment to tax reform implementation		3.20%	0.00%
Other (net), percent		(0.20%)	(1.00%)
Effective income tax rate, percent		(5.60%)	(11.00%)

[1] Wind PTCs net of estimated transfer discounts. Gross PTCs are generally credited to customers (reduction to revenue) and do not materially impact earnings.

[2] Plant regulatory differences primarily relate to the credit of excess deferred taxes to customers. Income tax benefits associated with the credit are offset by corresponding revenue reductions.