CONDENSED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
OPERATING REVENUES	$ 456.0	$ 433.1
COST OF SALES	208.7	177.9
OPERATING EXPENSES
Other operation and maintenance	126.1	116.3
Depreciation and amortization	54.7	76.7
Taxes other than income	22.3	23.6
Total operating expenses	203.1	216.6
OPERATING INCOME	44.2	38.6
OTHER INCOME (EXPENSE)
Allowance for equity funds used during construction	6.9	1.6
Other income	6.4	4.0
Other expense	(0.4)	(0.3)
Net other income	12.9	5.3
INTEREST EXPENSE
Interest on long-term debt	35.5	35.5
Allowance for borrowed funds used during construction	(3.3)	(0.9)
Interest on short-term debt and other interest charges	1.4	0.9
Interest expense	33.6	35.5
INCOME BEFORE TAXES	23.5	8.4
INCOME TAX EXPENSE	7.3	2.3
NET INCOME	16.2	6.1
Other comprehensive income (loss), net of tax	0.0	0.0
COMPREHENSIVE INCOME	$ 16.2	$ 6.1