CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014
CASH FLOWS FROM OPERATING ACTIVITIES
Net income		$ 241.9	$ 337.4
Adjustments to reconcile net income to net cash provided from operating activities
Depreciation and amortization		230.0	207.2
Deferred income taxes and investment tax credits, net		62.3	142.1
Equity in earnings of unconsolidated affiliates	[1]	12.0	(131.9)
Distributions from unconsolidated affiliates		67.1	110.1
Allowance for equity funds used during construction		(5.4)	(3.0)
Stock-based compensation		3.8	(5.4)
Excess tax benefit on stock-based compensation		(5.2)	0.0
Regulatory assets		12.7	1.6
Regulatory liabilities		(13.9)	(5.6)
Other assets		12.7	(18.8)
Other liabilities		0.1	24.8
Change in certain current assets and liabilities
Accounts receivable, net		(33.8)	(58.8)
Accounts receivable - unconsolidated affiliates		0.5	5.5
Accrued unbilled revenues		(22.4)	(13.3)
Fuel, materials and supplies inventories		(25.5)	33.5
Fuel clause under recoveries		66.7	(58.1)
Other current assets		(8.9)	(6.4)
Accounts payable		(57.7)	(100.7)
Fuel clause over recoveries		34.5	(0.4)
Other current liabilities		37.6	6.7
Net Cash Provided from Operating Activities		609.1	466.5
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures (less allowance for equity funds used during construction)		(375.0)	(437.4)
Return of capital - equity method investments		36.9	9.5
Proceeds from sale of assets		2.2	0.6
Net Cash Used in Investing Activities		(335.9)	(427.3)
CASH FLOWS FROM FINANCING ACTIVITIES
Dividends paid on common stock		(149.7)	(134.3)
Proceeds from long-term debt		0.0	246.5
Issuance of common stock		7.2	10.1
Excess tax benefit on stock-based compensation		5.2	0.0
Payment of long-term debt		(0.1)	(140.1)
Decrease in short-term debt		(98.0)	(28.2)
Net Cash Used in Financing Activities		(235.4)	(46.0)
NET CHANGE IN CASH AND CASH EQUIVALENTS		37.8	(6.8)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD		5.5	6.8
CASH AND CASH EQUIVALENTS AT END OF PERIOD		$ 43.3	$ 0.0

[1] The Company recorded a $108.4 million pre-tax charge during the nine months ended September 30, 2015 for its share of Enable's goodwill impairment, as adjusted for the basis differences. See Note 3 of this Form 10-Q for further discussion of Enable's goodwill impairment.