CONDENSED BALANCE SHEETS (Unaudited) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
CURRENT ASSETS
Accounts receivable, less reserve of $1.1 and $1.5, respectively	$ 185.0	$ 173.0
Accrued unbilled revenues	86.7	59.7
Advances to parent	46.0	0.0
Fuel inventories	77.5	79.8
Materials and supplies, at average cost	81.6	80.3
Fuel clause under recoveries	107.4	51.3
Other	70.3	78.3
Total current assets	654.5	522.4
OTHER PROPERTY AND INVESTMENTS	5.9	6.6
PROPERTY, PLANT AND EQUIPMENT
In service	10,727.9	10,572.3
Construction work in progress	797.9	495.1
Total property, plant and equipment	11,525.8	11,067.4
Less accumulated depreciation	3,447.7	3,385.6
Net property, plant and equipment	8,078.1	7,681.8
DEFERRED CHARGES AND OTHER ASSETS
Regulatory assets	406.8	404.8
Other	53.7	53.8
Total deferred charges and other assets	460.5	458.6
TOTAL ASSETS	9,199.0	8,669.4
CURRENT LIABILITIES
Accounts payable - affiliates	1.1	0.1
Accounts payable - other	180.2	196.3
Advances from parent	0.0	49.9
Customer deposits	79.1	77.7
Accrued taxes	39.2	40.8
Accrued interest	43.5	40.2
Accrued compensation	23.3	31.3
Long-term debt due within one year	125.0	125.0
Other	63.2	95.8
Total current liabilities	554.6	657.1
LONG-TERM DEBT	2,863.0	2,405.8
DEFERRED CREDITS AND OTHER LIABILITIES
Accrued benefit obligations	164.8	167.7
Deferred income taxes	1,797.1	1,752.3
Regulatory liabilities	321.6	299.7
Other	141.7	134.7
Total deferred credits and other liabilities	2,425.2	2,354.4
Total liabilities	5,842.8	5,417.3
COMMITMENTS AND CONTINGENCIES (NOTE 10)
STOCKHOLDER'S EQUITY
Common stockholder's equity	1,025.8	1,024.1
Retained earnings	2,330.4	2,228.0
Total stockholder's equity	3,356.2	3,252.1
TOTAL LIABILITIES AND STOCKHOLDER'S EQUITY	$ 9,199.0	$ 8,669.4