CONDENSED STATEMENTS OF INCOME (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
OPERATING REVENUES	$ 528.0	$ 568.7	$ 954.7	$ 990.8
COST OF GOODS SOLD (exclusive of depreciation and amortization shown below)	204.6	254.3	400.1	473.7
Gross margin on revenues	323.4	314.4	554.6	517.1
OPERATING EXPENSES
Other operation and maintenance	114.7	110.2	225.3	216.0
Depreciation and amortization	62.7	52.1	122.4	103.9
Taxes other than income	18.2	18.8	39.3	37.9
Total operating expenses	195.6	181.1	387.0	357.8
OPERATING INCOME	127.8	133.3	167.6	159.3
OTHER INCOME (EXPENSE)
Interest income	0.1	0.1	0.1	0.2
Allowance for equity funds used during construction	1.7	5.8	3.6	10.2
Other income	0.7	1.3	5.9	6.3
Other expense	(0.6)	(0.9)	(1.3)	(1.5)
Net other income	1.9	6.3	8.3	15.2
INTEREST EXPENSE
Interest on long-term debt	31.1	29.1	62.1	56.9
Allowance for borrowed funds used during construction	(0.9)	(2.9)	(2.0)	(5.2)
Interest on short-term debt and other interest charges	0.9	1.1	1.9	1.7
Interest expense	31.1	27.3	62.0	53.4
INCOME BEFORE TAXES	98.6	112.3	113.9	121.1
INCOME TAX EXPENSE	25.2	33.7	28.4	36.1
NET INCOME	$ 73.4	$ 78.6	$ 85.5	$ 85.0