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CONSOLIDATED STATEMENTS OF EARNINGS - USD ($)
shares in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Operating Revenues      
Total Operating Revenues $ 438.2 $ 444.1 $ 406.2
Operating Expenses      
Operation and Maintenance 67.2 69.5 64.5
Depreciation and Amortization 52.0 50.4 46.9
Taxes Other Than Income Taxes 22.7 22.4 21.1
Total Operating Expenses 365.1 372.9 330.8
Operating Income 73.1 71.2 75.4
Interest Expense, Net 23.7 24.0 23.1
Other (Income) Expense, Net (8.6) 5.8 5.8
Income Before Income Taxes 58.0 41.4 46.5
Provision for Income Taxes 13.8 8.4 17.5
Net Income Applicable to Common Shares $ 44.2 $ 33.0 $ 29.0
Earnings per Common Share—Basic and Diluted $ 2.97 $ 2.23 $ 2.06
Weighted Average Common Shares Outstanding—(Basic and Diluted) 14.9 14.8 14.1
Gas      
Operating Revenues      
Total Operating Revenues $ 203.4 $ 216.1 $ 194.0
Operating Expenses      
Total Operating Expenses 81.2 99.2 84.3
Electric      
Operating Revenues      
Total Operating Revenues 233.9 223.3 206.2
Operating Expenses      
Total Operating Expenses 142.0 131.4 114.0
Other      
Operating Revenues      
Total Operating Revenues $ 0.9 $ 4.7 $ 6.0