CONDENSED BALANCE SHEETS (Unaudited) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
CURRENT ASSETS
Accounts receivable, less reserve of $1.5 and $1.5, respectively	$ 261.5	$ 173.0
Accrued unbilled revenues	69.8	59.7
Advances to parent	32.6	0.0
Fuel inventories	77.2	79.8
Materials and supplies, at average cost	78.9	80.3
Fuel clause under recoveries	35.5	51.3
Other	53.5	78.3
Total current assets	609.0	522.4
OTHER PROPERTY AND INVESTMENTS	6.0	6.6
PROPERTY, PLANT AND EQUIPMENT
In service	10,791.4	10,572.3
Construction work in progress	893.9	495.1
Total property, plant and equipment	11,685.3	11,067.4
Less accumulated depreciation	3,494.7	3,385.6
Net property, plant and equipment	8,190.6	7,681.8
DEFERRED CHARGES AND OTHER ASSETS
Regulatory assets	373.4	404.8
Other	51.9	53.8
Total deferred charges and other assets	425.3	458.6
TOTAL ASSETS	9,230.9	8,669.4
CURRENT LIABILITIES
Accounts payable - affiliates	1.0	0.1
Accounts payable - other	134.9	196.3
Advances from parent	0.0	49.9
Customer deposits	79.5	77.7
Accrued taxes	58.9	40.8
Accrued interest	38.9	40.2
Accrued compensation	21.3	31.3
Long-term debt due within one year	249.7	125.0
Other	36.2	95.8
Total current liabilities	620.4	657.1
LONG-TERM DEBT	2,749.5	2,405.8
DEFERRED CREDITS AND OTHER LIABILITIES
Accrued benefit obligations	106.9	167.7
Deferred income taxes	1,870.6	1,752.3
Regulatory liabilities	331.7	299.7
Other	138.9	134.7
Total deferred credits and other liabilities	2,448.1	2,354.4
Total liabilities	5,818.0	5,417.3
COMMITMENTS AND CONTINGENCIES (NOTE 10)
STOCKHOLDER'S EQUITY
Common stockholder's equity	1,026.0	1,024.1
Retained earnings	2,386.9	2,228.0
Total stockholder's equity	3,412.9	3,252.1
TOTAL LIABILITIES AND STOCKHOLDER'S EQUITY	$ 9,230.9	$ 8,669.4