Income Taxes (Tables)

3 Months Ended

Mar. 31, 2025

Income Tax Disclosure [Abstract]

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

Reconciliation between the statutory rate and ETR:

	Three Months Ended March 31
	2025		2024
Federal statutory rate	21.0	%	21.0	%
State tax (net of federal tax effect)	2.0		2.5
(Decreases) increases:
PTCs (a)	(78.0)		(69.7)
Plant regulatory differences (b)	(4.3)		(4.5)
Amortization of excess nonplant deferred taxes	0.3		0.3
Other, net	3.7		0.4
Effective income tax rate	(55.3)	%	(50.0)	%

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

(b)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.