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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Operating Activities:    
Net Income $ 21.6 $ 18.3
Adjustments to Reconcile Net Income to Cash Provided by Operating Activities:    
Depreciation and Amortization 29.7 27.0
Deferred Tax Provision 6.2 4.8
Changes in Working Capital Items:    
Accounts Receivable 11.7 6.8
Accrued Revenue 16.3 15.1
Exchange Gas Receivable (0.3) 1.9
Regulatory Liabilities 11.6 5.2
Accounts Payable (0.6) (12.9)
Other Changes in Working Capital Items (3.3) (8.0)
Deferred Regulatory and Other Charges (9.4) (0.8)
Other, net 0.9 0.9
Cash Provided by Operating Activities 84.4 58.3
Investing Activities:    
Property, Plant and Equipment Additions (42.5) (48.8)
Cash (Used in) Investing Activities (42.5) (48.8)
Financing Activities:    
(Repayment of) Proceeds from Short-Term Debt, net (25.0) 16.3
Repayment of Long-Term Debt (7.3) (14.4)
Net Increase (Decrease) in Exchange Gas Financing 0.4 (1.6)
Dividends Paid (11.5) (11.3)
Proceeds from Issuance of Common Stock 0.5 0.5
Cash (Used in) Financing Activities (42.9) (10.5)
Net Decrease in Cash and Cash Equivalents (1.0) (1.0)
Cash and Cash Equivalents at Beginning of Period 6.0 5.2
Cash and Cash Equivalents at End of Period 5.0 4.2
Supplemental Cash Flow Information:    
Interest Paid 13.2 12.6
Income Taxes Paid 1.0 0.6
Payments on Capital Leases 0.1 0.2
Non-cash Investing Activity:    
Capital Expenditures Included in Accounts Payable 3.9 0.9
Right-of-Use Assets Obtained in Exchange for Lease Obligations $ 0.4 $ 0.5