CONDENSED STATEMENTS OF INCOME (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
OPERATING REVENUES	$ 480.1	$ 560.4
COST OF SALES	211.6	293.4
OPERATING EXPENSES
Other operation and maintenance	114.3	117.1
Depreciation and amortization	73.8	64.3
Taxes other than income	23.1	23.8
Total operating expenses	211.2	205.2
OPERATING INCOME	57.3	61.8
OTHER INCOME (EXPENSE)
Allowance for equity funds used during construction	1.5	1.1
Other income (loss)	1.7	(0.3)
Other expense	(0.3)	(0.4)
Net other income	2.9	0.4
INTEREST EXPENSE
Interest on long-term debt	36.7	33.7
Allowance for borrowed funds used during construction	(0.8)	(0.6)
Interest on short-term debt and other interest charges	0.9	0.8
Interest expense	36.8	33.9
INCOME BEFORE TAXES	23.4	28.3
INCOME TAX EXPENSE	6.3	7.6
NET INCOME	17.1	20.7
Other comprehensive income (loss), net of tax	0	0
COMPREHENSIVE INCOME	$ 17.1	$ 20.7