CONSOLIDATED STATEMENTS OF EARNINGS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Revenues
Total Operating Revenues	$ 473.3	$ 418.6	$ 438.2
Operating Expenses
Operation and Maintenance	68.7	65.7	67.2
Depreciation and Amortization	59.5	54.5	52.0
Taxes Other Than Income Taxes	24.5	23.9	22.7
Total Operating Expenses	395.5	347.2	365.1
Operating Income	77.8	71.4	73.1
Interest Expense, Net	25.6	23.8	23.7
Other Expense (Income), Net	4.6	5.2	(8.6)
Income Before Income Taxes	47.6	42.4	58.0
Provision for Income Taxes	11.5	10.2	13.8
Net Income Applicable to Common Shares	$ 36.1	$ 32.2	$ 44.2
Earnings per Common Share—Basic and Diluted	$ 2.35	$ 2.15	$ 2.97
Weighted Average Common Shares Outstanding—(Basic and Diluted)	15.4	15.0	14.9
Electric
Operating Revenues
Total Operating Revenues	$ 248.5	$ 227.2	$ 233.9
Operating Expenses
Total Operating Expenses	151.1	134.3	142.0
Gas
Operating Revenues
Total Operating Revenues	224.8	191.4	203.4
Other
Operating Revenues
Total Operating Revenues			0.9
Operating Expenses
Total Operating Expenses	$ 91.7	$ 68.8	$ 81.2