CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
CURRENT ASSETS
Cash and cash equivalents	$ 0	$ 6.8
Accounts receivable, less reserve of $1.5 and $1.9, respectively	238.2	179.4
Accounts receivable - unconsolidated affiliates	6.9	12.4
Accrued unbilled revenues	72.0	58.7
Fuel inventories	45.4	74.4
Materials and supplies, at average cost	79.0	80.7
Deferred income taxes	168.2	215.8
Fuel clause under recoveries	84.3	26.2
Other	46.0	40.2
Total current assets	740.0	694.6
OTHER PROPERTY AND INVESTMENTS
Investment in unconsolidated affiliates	1,311.1	1,298.8
Other	67.4	61.0
Total other property and investments	1,378.5	1,359.8
PROPERTY, PLANT AND EQUIPMENT
In service	9,722.6	9,183.1
Construction work in progress	297.5	468.5
Total property, plant and equipment	10,020.1	9,651.6
Less accumulated depreciation	3,093.0	2,978.8
Net property, plant and equipment	6,927.1	6,672.8
DEFERRED CHARGES AND OTHER ASSETS
Regulatory assets	372.6	379.1
Other	44.5	28.4
Total deferred charges and other assets	417.1	407.5
TOTAL ASSETS	9,462.7	9,134.7
CURRENT LIABILITIES
Short-term debt	411.4	439.6
Accounts payable	143.1	251.0
Dividends payable	49.8	44.7
Customer deposits	72.4	70.9
Accrued taxes	56.1	39.9
Accrued interest	32.9	43.4
Accrued compensation	43.6	56.9
Long-term debt due within one year	0	100.0
Other	59.8	47.4
Total current liabilities	869.1	1,093.8
LONG-TERM DEBT	2,509.7	2,300.1
DEFERRED CREDITS AND OTHER LIABILITIES
Accrued benefit obligations	247.7	241.5
Deferred income taxes	2,219.2	2,125.3
Regulatory liabilities	266.6	234.2
Other	107.4	102.7
Total deferred credits and other liabilities	2,840.9	2,703.7
Total liabilities	6,219.7	6,097.6
COMMITMENTS AND CONTINGENCIES (NOTE 12)
STOCKHOLDERS' EQUITY
Common stockholders' equity	1,080.7	1,073.6
Retained earnings	2,189.6	1,991.7
Accumulated other comprehensive loss, net of tax	(27.3)	(28.2)
Total stockholders' equity	3,243.0	3,037.1
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 9,462.7	$ 9,134.7