CONDENSED BALANCE SHEETS (Unaudited) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
CURRENT ASSETS
Accounts receivable, less reserve of $1.6 and $1.5, respectively	$ 243.5	$ 188.5
Accrued unbilled revenues	68.3	66.5
Advances to parent	299.7	112.5
Fuel inventories	64.5	84.3
Materials and supplies, at average cost	132.2	80.8
Other	23.3	48.6
Total current assets	831.5	581.2
OTHER PROPERTY AND INVESTMENTS	5.6	5.9
PROPERTY, PLANT AND EQUIPMENT
In service	11,598.6	11,035.1
Construction work in progress	632.9	867.5
Total property, plant and equipment	12,231.5	11,902.6
Less accumulated depreciation	3,680.6	3,568.8
Net property, plant and equipment	8,550.9	8,333.8
DEFERRED CHARGES AND OTHER ASSETS
Regulatory assets	256.2	283.0
Other	7.8	51.7
Total deferred charges and other assets	264.0	334.7
TOTAL ASSETS	9,652.0	9,255.6
CURRENT LIABILITIES
Accounts payable	154.4	216.8
Customer deposits	83.1	80.7
Accrued taxes	62.6	41.5
Accrued interest	39.5	44.0
Accrued compensation	28.2	25.6
Long-term debt due within one year	249.9	249.8
Fuel clause over recoveries	39.2	1.7
Other	82.1	28.5
Total current liabilities	739.0	688.6
LONG-TERM DEBT	2,896.8	2,749.6
DEFERRED CREDITS AND OTHER LIABILITIES
Accrued benefit obligations	99.5	110.3
Deferred income taxes	887.9	832.2
Regulatory liabilities	1,291.0	1,283.4
Other	156.5	135.8
Total deferred credits and other liabilities	2,434.9	2,361.7
Total liabilities	6,070.7	5,799.9
COMMITMENTS AND CONTINGENCIES (NOTE 11)
STOCKHOLDER'S EQUITY
Common stockholder's equity	1,030.6	1,027.2
Retained earnings	2,550.7	2,428.5
Total stockholder's equity	3,581.3	3,455.7
TOTAL LIABILITIES AND STOCKHOLDER'S EQUITY	$ 9,652.0	$ 9,255.6