CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Revenues from contracts with customers	$ 739.2	$ 684.5	$ 1,717.7	$ 1,710.1
Other revenues	16.2	14.3	41.4	48.4
Operating revenues	755.4	698.8	1,759.1	1,758.5
COST OF SALES	234.0	244.4	625.3	663.6
OPERATING EXPENSES
Other operation and maintenance	129.8	123.3	368.6	353.2
Depreciation and amortization	94.1	81.1	260.8	240.8
Taxes other than income	23.2	22.7	70.4	69.3
Operating expenses	247.1	227.1	699.8	663.3
OPERATING INCOME	274.3	227.3	434.0	431.6
OTHER INCOME (EXPENSE)
Equity in earnings of unconsolidated affiliates	38.3	40.1	104.8	103.3
Allowance for equity funds used during construction	1.0	6.7	3.7	20.0
Other net periodic benefit expense	(1.4)	(0.7)	(8.7)	(10.7)
Other income	4.6	4.1	16.3	14.2
Other expense	(5.5)	(3.4)	(15.6)	(11.1)
Net other income	37.0	46.8	100.5	115.7
INTEREST EXPENSE
Interest on long-term debt	37.5	40.2	101.9	119.5
Allowance for borrowed funds used during construction	(0.6)	(3.3)	(2.2)	(9.8)
Interest on short-term debt and other interest charges	2.7	1.8	10.4	8.5
Interest expense	39.6	38.7	110.1	118.2
INCOME BEFORE TAXES	271.7	235.4	424.4	429.1
INCOME TAX EXPENSE	20.8	30.3	26.2	58.3
NET INCOME	$ 250.9	$ 205.1	$ 398.2	$ 370.8
BASIC AVERAGE COMMON SHARES OUTSTANDING	200.2	199.7	200.1	199.7
DILUTED AVERAGE COMMON SHARES OUTSTANDING	200.8	200.6	200.6	200.4
BASIC EARNINGS PER AVERAGE COMMON SHARE	$ 1.25	$ 1.03	$ 1.99	$ 1.86
DILUTED EARNINGS PER AVERAGE COMMON SHARE	$ 1.25	$ 1.02	$ 1.98	$ 1.85