STATEMENTS OF INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenue from Contract with Customer, Excluding Assessed Tax	$ 2,175.5	$ 2,211.7	$ 0.0
Revenues from Alternative Revenue Programs	56.1	58.6	0.0
Revenues	2,231.6	2,270.3	2,261.1
Cost of Goods and Services Sold	786.9	892.5	897.6
OPERATING EXPENSES
Other operation and maintenance	492.5	473.8	469.8
Depreciation and amortization	355.0	321.6	280.9
Taxes other than income	89.5	88.2	84.8
Operating expenses	937.0	883.6	835.5
OPERATING INCOME	507.7	494.2	528.0
OTHER INCOME (EXPENSE)
Allowance for equity funds used during construction	4.5	23.8	39.7
Pension and Other Postretirement Benefits Cost (Reversal of Cost)	(1.2)	(8.9)	(16.3)
Other income	6.7	14.1	36.6
Other expense	(6.9)	(3.4)	(2.3)
Net other income	3.1	25.6	57.7
INTEREST EXPENSE
Interest on long-term debt	138.3	157.4	151.9
Allowance for borrowed funds used during construction	(2.8)	(11.7)	(18.0)
Interest on short-term debt and other interest charges	5.0	6.1	4.5
Interest expense	140.5	151.8	138.4
INCOME BEFORE TAXES	370.3	368.0	447.3
INCOME TAX EXPENSE	20.1	40.0	141.8
NET INCOME	350.2	328.0	305.5
Other comprehensive income, net of tax	0.0	0.0	0.0
COMPREHENSIVE INCOME	$ 350.2	$ 328.0	$ 305.5