CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 425.5	$ 619.0	$ 338.2
Adjustments to reconcile net income to net cash provided from operating activities:
Depreciation and amortization	321.6	283.5	322.6
Deferred income taxes and investment tax credits, net	78.5	(50.0)	153.8
Equity in earnings of unconsolidated affiliates	(152.8)	(131.2)	(101.8)
Distributions from unconsolidated affiliates	141.2	131.2	102.3
Allowance for equity funds used during construction	(23.8)	(39.7)	(14.2)
Stock-based compensation expense	13.4	9.1	4.7
Regulatory assets	10.8	(3.7)	21.4
Regulatory liabilities	(16.5)	(3.7)	(11.8)
Other assets	6.2	(0.7)	15.4
Other liabilities	1.0	(65.5)	(18.9)
Change in certain current assets and liabilities:
Accounts receivable and accrued unbilled revenues, net	19.8	(21.8)	(6.9)
Income taxes receivable	(4.1)	13.6	(2.2)
Fuel, materials and supplies inventories	27.3	(3.6)	32.4
Fuel recoveries	(3.4)	53.0	(112.6)
Other current assets	25.1	27.2	(26.2)
Accounts payable	29.7	27.1	(45.1)
Other current liabilities	73.2	(66.7)	36.4
Net cash provided from operating activities	951.1	784.5	644.7
CASH FLOWS FROM INVESTING ACTIVITIES
Capital expenditures (less allowance for equity funds used during construction)	(573.6)	(824.1)	(660.1)
Investment in unconsolidated affiliates	(2.5)	(8.5)	0.0
Return of capital - unconsolidated affiliates	0.0	10.0	38.8
Proceeds from sale of assets	0.1	0.7	0.9
Net cash used in investing activities	(576.0)	(821.9)	(620.4)
CASH FLOWS FROM FINANCING ACTIVITIES
(Decrease) increase in short-term debt	(168.4)	(67.8)	236.2
Proceeds from long-term debt	396.0	592.1	0.0
Payment of long-term debt	(250.1)	(225.1)	(110.2)
Dividends paid on common stock	(272.2)	(247.6)	(225.1)
Expense of common stock	(0.1)	(0.1)	0.0
Other	(0.4)	0.0	(0.1)
Net cash (used in) provided from financing activities	(295.2)	51.5	(99.2)
NET CHANGE IN CASH AND CASH EQUIVALENTS	79.9	14.1	(74.9)
CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD	14.4	0.3	75.2
CASH AND CASH EQUIVALENTS AT END OF PERIOD	$ 94.3	$ 14.4	$ 0.3

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