Income Taxes (Details)		3 Months Ended
		Mar. 31, 2025	Mar. 31, 2024
Income Tax Disclosure [Abstract]
Federal statutory rate, percent		21.00%	21.00%
State tax (net of federal tax effect), percent		2.00%	2.50%
Wind PTCs, percent	[1]	(78.00%)	(69.70%)
Plant regulatory differences, percent	[2]	(4.30%)	(4.50%)
Other tax credits, percent		0.30%	0.30%
Other (net), percent		3.70%	0.40%
Effective income tax rate, percent		(55.30%)	(50.00%)

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

[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.