CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
CURRENT ASSETS
Cash and cash equivalents	$ 75.2	$ 5.5
Accounts receivable, less reserve of $1.4 and $1.6, respectively	173.1	188.8
Accounts receivable - unconsolidated affiliates	1.7	5.6
Accrued unbilled revenues	53.5	55.5
Income taxes receivable	17.2	16.0
Fuel inventories	113.8	58.5
Materials and supplies, at average cost	80.1	78.9
Deferred income taxes	0.0	191.4
Fuel clause under recoveries	0.0	68.3
Other	55.6	38.4
Total current assets	570.2	706.9
OTHER PROPERTY AND INVESTMENTS
Investment in unconsolidated affiliates	1,194.4	1,318.2
Other	70.7	70.1
Total other property and investments	1,265.1	1,388.3
PROPERTY, PLANT AND EQUIPMENT
In service	10,318.3	9,983.0
Construction work in progress	278.5	115.9
Total property, plant and equipment	10,596.8	10,098.9
Less accumulated depreciation	3,274.4	3,119.0
Net property, plant and equipment	7,322.4	6,979.9
DEFERRED CHARGES AND OTHER ASSETS
Regulatory assets	402.2	410.4
Other	37.5	42.3
Total deferred charges and other assets	439.7	452.7
TOTAL ASSETS	9,597.4	9,527.8
CURRENT LIABILITIES
Short-term debt	0.0	98.0
Accounts payable	262.5	179.1
Dividends payable	54.9	49.9
Customer deposits	77.0	73.7
Accrued taxes	45.9	39.7
Accrued interest	42.9	43.0
Accrued compensation	54.4	38.2
Long-term debt due within one year	110.0	0.0
Fuel clause over recoveries	61.3	0.0
Other	43.9	51.7
Total current liabilities	752.8	573.3
LONG-TERM DEBT	2,645.6	2,755.3
DEFERRED CREDITS AND OTHER LIABILITIES
Accrued benefit obligations	299.9	315.5
Deferred income taxes	2,178.2	2,268.3
Regulatory liabilities	272.6	263.0
Other	122.3	108.0
Total deferred credits and other liabilities	2,873.0	2,954.8
Total liabilities	$ 6,271.4	$ 6,283.4
COMMITMENTS AND CONTINGENCIES (NOTE 14)
STOCKHOLDERS' EQUITY
Common stockholders' equity	$ 1,101.3	$ 1,087.6
Retained earnings	2,259.8	2,198.2
Accumulated other comprehensive loss, net of tax	(35.1)	(41.4)
Total stockholders' equity	3,326.0	3,244.4
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 9,597.4	$ 9,527.8