STATEMENTS OF INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue from Contract with Customer, Excluding Assessed Tax	$ 2,211.7	$ 0.0	$ 0.0
Revenues from Alternative Revenue Programs	58.6	0.0	0.0
Revenues	2,270.3	2,261.1	2,259.2
Cost of Goods and Services Sold	892.5	897.6	880.1
OPERATING EXPENSES
Other operation and maintenance	473.8	469.8	451.2
Depreciation and amortization	321.6	280.9	316.4
Taxes other than income	88.2	84.8	84.0
Operating expenses	883.6	835.5	851.6
OPERATING INCOME	494.2	528.0	527.5
OTHER INCOME (EXPENSE)
Allowance for equity funds used during construction	23.8	39.7	14.2
Pension and Other Postretirement Benefits Cost (Reversal of Cost)	(8.9)	(16.3)	(18.6)
Other income	14.1	36.6	16.4
Other expense	(3.4)	(2.3)	(2.9)
Net other income	25.6	57.7	9.1
INTEREST EXPENSE
Interest on long-term debt	157.4	151.9	141.7
Allowance for borrowed funds used during construction	(11.7)	(18.0)	(7.5)
Interest on short-term debt and other interest charges	6.1	4.5	3.9
Interest expense	151.8	138.4	138.1
INCOME BEFORE TAXES	368.0	447.3	398.5
INCOME TAX EXPENSE	40.0	141.8	114.4
NET INCOME	328.0	305.5	284.1
Other comprehensive income (loss), net of tax	0.0	0.0	0.0
COMPREHENSIVE INCOME	$ 328.0	$ 305.5	$ 284.1