CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating activities
Net income	$ 78.9	$ 98.0	$ 79.4
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization	138.6	127.6	112.7
Deferred income taxes	5.4	23.3	45.6
Allowance for equity funds used during construction	(3.2)	(9.2)	(6.7)
Provision for bad debts	7.0	4.2	4.1
Net derivative losses	(0.2)	(0.1)	0.1
Changes in operating assets and liabilities:
Accounts receivable	(10.1)	(4.6)	(9.9)
Accrued unbilled revenues	3.2	3.8	(6.4)
Inventories	(7.9)	(7.5)	0.6
Other current assets	12.6	2.1	0.9
Accounts payable	(10.3)	(9.1)	9.0
Net regulatory assets and liabilities	15.0	(19.8)	(31.2)
Other current liabilities	10.9	(13.1)	(2.2)
Pension and other employee benefit obligations	(6.6)	(14.6)	(8.6)
Increase (Decrease) in Other Operating Assets and Liabilities, Net	0.4	2.7	(7.6)
Net cash provided by operating activities	233.7	183.7	179.8
Investing activities
Utility capital/construction expenditures	(211.9)	(226.6)	(212.1)
Other, net	(0.2)	0.2	0.0
Net cash used in investing activities	(212.1)	(226.4)	(212.1)
Financing activities
Proceeds from (repayments of) short-term borrowings, net	14.0	40.0	(49.0)
Proceeds from issuance of long-term debt	0.0	196.6	97.5
Repayments of long-term debt	(0.2)	(151.1)	(0.1)
Capital contributions from parent	48.1	49.2	48.0
Dividends paid to parent	(84.4)	(91.1)	(64.0)
Other, net	0.0	(0.1)	(0.2)
Net cash (used in) provided by financing activities	(22.5)	43.5	32.2
Net change in cash, cash equivalents and restricted cash	(0.9)	0.8	(0.1)
Cash, cash equivalents and restricted cash at beginning of period	2.2	1.4	1.5
Cash, cash equivalents and restricted cash at end of period	1.3	2.2	1.4
Supplemental disclosure of cash flow information:
Cash paid for interest (net of amounts capitalized)	(36.3)	(32.9)	(30.9)
Cash received (paid) for income taxes, net	0.4	(20.6)	(5.0)
Supplemental disclosure of non-cash investing transactions:
Accrued property, plant and equipment additions	29.3	32.0	31.0
Inventory transfers to plant, property and equipment	9.0	8.2	5.5
Allowance for Funds Used During Construction, Investing Activities	$ 3.2	$ 9.2	$ 6.7