CONDENSED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 249.0	$ 254.9
Adjustments to reconcile net income to net cash provided from operating activities
Depreciation and amortization	224.0	198.7
Deferred income taxes and investment tax credits, net	124.5	156.7
Allowance for equity funds used during construction	(5.4)	(3.0)
Stock-based compensation expense	1.9	2.1
Regulatory assets	12.7	1.6
Regulatory liabilities	(13.9)	(5.6)
Other assets	10.7	(5.8)
Other liabilities	(2.1)	11.2
Change in certain current assets and liabilities
Accounts receivable, net	(33.8)	(58.7)
Accrued unbilled revenues	(22.4)	(13.3)
Fuel, materials and supplies inventories	(25.6)	33.5
Fuel clause under recoveries	66.7	(58.1)
Other current assets	(6.5)	2.9
Accounts payable	(51.1)	(94.9)
Accounts payable - affiliates	0.9	(0.2)
Income taxes payable - parent	(32.6)	(61.9)
Fuel clause over recoveries	34.5	(0.4)
Other current liabilities	20.1	16.3
Net Cash Provided from Operating Activities	551.6	376.0
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures (less allowance for equity funds used during construction)	(371.0)	(437.1)
Proceeds from sale of assets	2.2	0.6
Net Cash Used in Investing Activities	(368.8)	(436.5)
CASH FLOWS FROM FINANCING ACTIVITIES
Dividends paid on common stock	(90.0)	(110.0)
Proceeds from long-term debt	0.0	246.5
Payment of long-term debt	(0.1)	(140.1)
Changes in advances with parent	(92.7)	64.1
Net Cash (Used in) Provided from Financing Activities	(182.8)	60.5
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