CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 47.1	$ 55.0
Adjustments to reconcile net income to net cash provided from operating activities:
Depreciation and amortization	82.4	78.8
Deferred income taxes and investment tax credits, net	(0.5)	7.3
Equity in earnings of unconsolidated affiliates	(30.7)	(33.9)
Distributions from unconsolidated affiliates	35.3	33.9
Allowance for equity funds used during construction	(1.5)	(7.0)
Stock-based compensation expense	3.0	2.7
Regulatory assets	(7.3)	0.2
Regulatory liabilities	(7.0)	2.6
Other assets	3.8	(0.6)
Other liabilities	15.9	0.9
Change in certain current assets and liabilities:
Accounts receivable and accrued unbilled revenues, net	19.2	14.8
Fuel, materials and supplies inventories	9.1	(12.2)
Fuel recoveries	(22.8)	48.2
Other current assets	(11.0)	8.3
Accounts payable	(42.6)	(23.7)
Other current liabilities	(55.9)	(9.5)
Net cash provided from operating activities	28.9	167.0
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures (less allowance for equity funds used during construction)	(152.9)	(137.4)
Investment in unconsolidated affiliates	(1.0)	(1.6)
Return of capital - unconsolidated affiliates	0.0	1.4
Net cash used in investing activities	(153.9)	(137.6)
CASH FLOWS FROM FINANCING ACTIVITIES
Increase in short-term debt	366.4	25.5
Payment of long-term debt	(250.0)	0.0
Dividends paid on common stock	(75.5)	(66.6)
Expense of common stock	(10.2)	(0.4)
Net cash provided from (used in) financing activities	30.7	(41.5)
NET CHANGE IN CASH AND CASH EQUIVALENTS	(94.3)	(12.1)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	94.3	14.4
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 0.0	$ 2.3