Income Taxes (Details)		6 Months Ended
		Jun. 30, 2025	Jun. 30, 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]	(49.70%)	(53.20%)
Plant regulatory differences, percent	[2]	(4.30%)	(4.60%)
Other tax credits, percent		0.30%	0.30%
Other (net), percent		0.60%	0.10%
Effective income tax rate, percent		(30.10%)	(33.90%)

[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.