CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Mar. 31, 2016	Dec. 31, 2015
CURRENT ASSETS
Cash and cash equivalents	$ 0.0	$ 75.2
Accounts receivable, less reserve of $1.0 and $1.4, respectively	135.1	173.1
Accounts receivable - unconsolidated affiliates	2.9	1.7
Accrued unbilled revenues	51.4	53.5
Income taxes receivable	17.4	17.2
Fuel inventories	105.4	113.8
Materials and supplies, at average cost	78.3	80.1
Other	65.4	55.6
Total current assets	455.9	570.2
OTHER PROPERTY AND INVESTMENTS
Investment in unconsolidated affiliates	1,187.4	1,194.4
Other	69.5	70.7
Total other property and investments	1,256.9	1,265.1
PROPERTY, PLANT AND EQUIPMENT
In service	10,415.7	10,318.3
Construction work in progress	300.1	278.5
Total property, plant and equipment	10,715.8	10,596.8
Less accumulated depreciation	3,328.3	3,274.4
Net property, plant and equipment	7,387.5	7,322.4
DEFERRED CHARGES AND OTHER ASSETS
Regulatory assets	402.8	402.2
Other	20.2	20.7
Total deferred charges and other assets	423.0	422.9
TOTAL ASSETS	9,523.3	9,580.6
CURRENT LIABILITIES
Short-term debt	187.5	0.0
Accounts payable	172.7	262.5
Dividends payable	54.9	54.9
Customer deposits	77.9	77.0
Accrued taxes	24.7	45.9
Accrued interest	32.9	42.9
Accrued compensation	55.6	54.4
Long-term debt due within one year	0.0	110.0
Fuel clause over recoveries	63.2	61.3
Other	37.1	43.9
Total current liabilities	706.5	752.8
LONG-TERM DEBT	2,629.3	2,628.8
DEFERRED CREDITS AND OTHER LIABILITIES
Accrued benefit obligations	298.2	299.9
Deferred income taxes	2,188.1	2,178.2
Regulatory liabilities	278.3	273.6
Other	124.6	121.3
Total deferred credits and other liabilities	2,889.2	2,873.0
Total liabilities	$ 6,225.0	$ 6,254.6
COMMITMENTS AND CONTINGENCIES (NOTE 12)
STOCKHOLDERS' EQUITY
Common stockholders' equity	$ 1,102.9	$ 1,101.3
Retained earnings	2,230.1	2,259.8
Accumulated other comprehensive loss, net of tax	(34.7)	(35.1)
Total stockholders' equity	3,298.3	3,326.0
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 9,523.3	$ 9,580.6