CONDENSED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 78.4	$ 86.1
Adjustments to reconcile net income to net cash provided from operating activities
Depreciation and amortization	155.1	148.1
Deferred income taxes and investment tax credits	32.7	52.5
Allowance for equity funds used during construction	(5.3)	(3.2)
Stock-based compensation expense	1.5	1.5
Regulatory assets	(4.0)	2.5
Regulatory liabilities	(8.4)	(2.0)
Other assets	3.7	5.5
Other liabilities	(8.4)	(3.1)
Change in certain current assets and liabilities
Accounts receivable, net	10.0	2.9
Accrued unbilled revenues	(37.4)	(30.8)
Fuel, materials and supplies inventories	11.2	(29.8)
Fuel clause under recoveries	0.0	64.6
Other current assets	(18.2)	(8.3)
Accounts payable	(42.6)	(36.1)
Accounts payable - affiliates	5.3	1.1
Income taxes payable - parent	0.4	(21.2)
Fuel clause over recoveries	(20.0)	1.6
Other current liabilities	(12.7)	9.5
Net Cash Provided from Operating Activities	141.3	241.4
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures (less allowance for equity funds used during construction)	(331.1)	(224.3)
Proceeds from sale of assets	0.2	2.0
Net Cash Used in Investing Activities	(330.9)	(222.3)
CASH FLOWS FROM FINANCING ACTIVITIES
Dividends paid on common stock	(60.0)	(60.0)
Payment of long-term debt	(110.1)	(0.1)
Changes in advances with parent	359.7	41.0
Net Cash Provided from (Used in) Financing Activities	189.6	(19.1)
NET CHANGE IN CASH AND CASH EQUIVALENTS	0.0	0.0
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	0.0	0.0
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 0.0	$ 0.0