STATEMENTS OF INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Operating revenues
Operating revenues	$ 423.4	$ 410.5	$ 818.4	$ 864.6
Operating expenses
Electric fuel and purchased power	198.8	179.9	386.6	410.8
Operating and maintenance expenses	58.3	70.1	127.9	142.5
Demand side management expenses	3.7	3.8	7.6	8.4
Depreciation and amortization	64.0	57.8	123.1	111.0
Taxes (other than income taxes)	18.3	17.0	39.7	35.5
Total operating expenses	343.1	328.6	684.9	708.2
Operating income	80.3	81.9	133.5	156.4
Other income (expense), net	0.1	0.5	(1.9)	0.9
Allowance for funds used during construction — equity	7.8	8.7	13.8	19.0
Interest charges and financing costs
Interest charges — includes other financing costs of $0.9, $0.8, $1.8 and $1.6, respectively	25.7	25.6	49.9	50.0
Allowance for funds used during construction — debt	(3.4)	(4.2)	(6.0)	(8.7)
Total interest charges and financing costs	22.3	21.4	43.9	41.3
Income before income taxes	65.9	69.7	101.5	135.0
Income tax (benefit) expense	(5.8)	10.9	(12.9)	22.1
Net income	$ 71.7	$ 58.8	$ 114.4	$ 112.9