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 effective tax rate:

	Three Months Ended March 31
	2025		2024
Federal statutory rate	21.0	%	21.0	%
State income tax on pretax income, net of federal tax effect	6.2		6.2
Decreases in tax from:
Plant regulatory differences (a)	(4.5)		(4.3)
Other, net	(0.5)		0.3
Effective income tax rate	22.2	%	23.2	%

(a)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.