CONDENSED BALANCE SHEETS - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
CURRENT ASSETS
Accounts receivable, less reserve of $1.0 and $1.4, respectively	$ 135.1	$ 173.1
Accrued unbilled revenues	51.4	53.5
Advances to parent	72.3	333.6
Fuel inventories	105.4	113.8
Materials and supplies, at average cost	77.1	78.8
Other	59.3	51.6
Total current assets	500.6	804.4
OTHER PROPERTY AND INVESTMENTS	5.4	5.6
PROPERTY, PLANT AND EQUIPMENT
In service	10,283.3	10,179.3
Construction work in progress	300.1	278.5
Total property, plant and equipment	10,583.4	10,457.8
Less accumulated depreciation	3,220.4	3,161.7
Net property, plant and equipment	7,363.0	7,296.1
DEFERRED CHARGES AND OTHER ASSETS
Regulatory assets	402.8	402.2
Other	16.7	17.2
Total deferred charges and other assets	419.5	419.4
TOTAL ASSETS	8,288.5	8,525.5
CURRENT LIABILITIES
Accounts payable - affiliates	1.7	2.2
Accounts payable - other	156.6	236.0
Customer deposits	77.9	77.0
Accrued taxes	24.5	45.7
Accrued interest	32.8	42.8
Accrued compensation	25.4	23.8
Long-term debt due within one year	0.0	110.0
Fuel clause over recoveries	63.2	61.3
Other	36.8	43.6
Total current liabilities	418.9	642.4
LONG-TERM DEBT	2,529.7	2,529.3
DEFERRED CREDITS AND OTHER LIABILITIES
Accrued benefit obligations	178.9	179.9
Deferred income taxes	1,639.5	1,637.8
Regulatory liabilities	278.3	273.6
Other	110.6	106.8
Total deferred credits and other liabilities	2,207.3	2,198.1
Total liabilities	$ 5,155.9	$ 5,369.8
COMMITMENTS AND CONTINGENCIES (NOTE 10)
STOCKHOLDER'S EQUITY
Common stockholder's equity	$ 1,022.6	$ 1,021.8
Retained earnings	2,110.0	2,133.9
Total stockholder's equity	3,132.6	3,155.7
TOTAL LIABILITIES AND STOCKHOLDER'S EQUITY	$ 8,288.5	$ 8,525.5