CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Operating Activities:
Net Income	$ 17.0	$ 15.3
Adjustments to Reconcile Net Income to Cash Provided by Operating Activities:
Depreciation and Amortization	34.1	31.2
Deferred Tax Provision	3.6	8.2
Changes in Working Capital Items:
Accounts Receivable	15.3	10.6
Accrued Revenue	19.7	25.2
Regulatory Liabilities	19.4	3.3
Taxes Payable	4.8	(0.1)
Exchange Gas Receivable	4.4	(3.7)
Accounts Payable	(23.0)	(18.8)
Other Changes in Working Capital Items	2.9	7.1
Deferred Regulatory and Other Charges	13.9	5.1
Other, net	(1.2)	(0.8)
Cash Provided by Operating Activities	110.9	82.6
Investing Activities:
Property, Plant and Equipment Additions	(70.9)	(60.7)
Cash (Used in) Investing Activities	(70.9)	(60.7)
Financing Activities:
Repayment of Short-Term Debt, net	(25.2)	(16.5)
Repayment of Long-Term Debt	(0.4)	(0.4)
Increase in Capital Lease Obligations	4.1	5.6
Net Increase (Decrease) in Exchange Gas Financing	(4.3)	3.6
Dividends Paid	(14.7)	(14.4)
Proceeds from Issuance of Common Stock, net	1.0	0.9
Cash (Used in) Financing Activities	(39.5)	(21.2)
Net Increase in Cash and Cash Equivalents	0.5	0.7
Cash and Cash Equivalents at Beginning of Period	8.4	9.4
Cash and Cash Equivalents at End of Period	8.9	10.1
Supplemental Cash Flow Information:
Interest Paid	14.9	13.5
Income Taxes Paid	1.8	1.2
Non-cash Investing Activity:
Capital Expenditures Included in Accounts Payable	$ 1.2	$ 1.7