BALANCE SHEETS - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015
CURRENT ASSETS
Accounts receivable, less reserve of $1.5 and $1.4, respectively	$ 173.0	$ 173.1
Accrued unbilled revenues	59.7	53.5
Advances to parent	0.0	333.6
Fuel inventories	79.8	113.8
Materials and supplies, at average cost	80.3	78.8
Fuel clause under recoveries	51.3	0.0
Other	78.3	51.6
Total current assets	522.4	804.4
OTHER PROPERTY AND INVESTMENTS	6.6	5.6
PROPERTY, PLANT AND EQUIPMENT
In service	10,572.3	10,179.3
Construction work in progress	495.1	278.5
Total property, plant and equipment	11,067.4	10,457.8
Less accumulated depreciation	3,385.6	3,161.7
Net property, plant and equipment	7,681.8	7,296.1
DEFERRED CHARGES AND OTHER ASSETS
Regulatory assets	404.8	402.2
Other	53.8	17.2
Total deferred charges and other assets	458.6	419.4
TOTAL ASSETS	8,669.4	8,525.5
CURRENT LIABILITIES
Accounts payable - affiliates	0.1	2.2
Accounts payable - other	196.3	236.0
Advances from parent	49.9	0.0
Customer deposits	77.7	77.0
Accrued taxes	40.8	45.7
Accrued interest	40.2	42.8
Accrued compensation	31.3	23.8
Long-term debt due within one year	125.0	110.0
Fuel clause over recoveries	0.0	61.3
Other	95.8	43.6
Total current liabilities	657.1	642.4
LONG-TERM DEBT	2,405.8	2,529.3
DEFERRED CREDITS AND OTHER LIABILITIES
Accrued benefit obligations	167.7	179.9
Deferred income taxes	1,752.3	1,637.8
Regulatory liabilities	299.7	273.6
Other	134.7	106.8
Total deferred credits and other liabilities	2,354.4	2,198.1
Total liabilities	5,417.3	5,369.8
COMMITMENTS AND CONTINGENCIES (NOTE 12)
STOCKHOLDER'S EQUITY
Common stockholder's equity	1,024.1	1,021.8
Retained earnings	2,228.0	2,133.9
Total stockholder's equity	3,252.1	3,155.7
TOTAL LIABILITIES AND STOCKHOLDER'S EQUITY	$ 8,669.4	$ 8,525.5