CONDENSED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenues from contracts with customers	$ 547.7	$ 0.0	$ 1,025.6	$ 0.0
Other revenues	19.3	0.0	34.1	0.0
Operating revenues	567.0	586.4	1,059.7	1,042.4
COST OF SALES	208.7	232.1	419.2	440.8
OPERATING EXPENSES
Other operation and maintenance	123.5	114.7	243.2	239.4
Depreciation and amortization	80.9	73.7	159.7	128.4
Taxes other than income	21.6	20.2	44.3	42.5
Operating expenses	226.0	208.6	447.2	410.3
OPERATING INCOME	132.3	145.7	193.3	191.3
OTHER INCOME (EXPENSE)
Allowance for equity funds used during construction	6.3	8.5	13.3	15.4
Other net periodic benefit income (expense)	0.8	(1.8)	2.1	(3.2)
Other income	3.5	7.7	6.6	14.1
Other expense	(0.6)	(0.6)	(1.4)	(1.0)
Net other income	10.0	13.8	20.6	25.3
INTEREST EXPENSE
Interest on long-term debt	39.7	38.6	79.3	74.1
Allowance for borrowed funds used during construction	(2.8)	(4.1)	(6.5)	(7.4)
Interest on short-term debt and other interest charges	2.3	1.1	3.7	2.5
Interest expense	39.2	35.6	76.5	69.2
INCOME BEFORE TAXES	103.1	123.9	137.4	147.4
INCOME TAX EXPENSE	11.1	37.7	14.1	45.0
NET INCOME	92.0	86.2	123.3	102.4
Other comprehensive income (loss), net of tax	0.0	0.0	0.0	0.0
COMPREHENSIVE INCOME	$ 92.0	$ 86.2	$ 123.3	$ 102.4