Income Taxes (Tables)

6 Months Ended

Jun. 30, 2024

Income Tax Disclosure [Abstract]

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

Reconciliation between the statutory rate and effective tax rate:

	Six Months Ended June 30
	2024		2023
Federal statutory rate	21.0	%	21.0	%
State tax (net of federal tax effect)	6.2		6.2
Decreases:
Plant regulatory differences (a)	(4.5)		(3.5)
Other, net	(0.3)		(0.9)
Effective income tax rate	22.4	%	22.8	%

(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.