CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
CURRENT ASSETS
Cash and cash equivalents	$ 90.7	$ 14.4
Accounts receivable, less reserve of $1.6 and $1.5, respectively	245.2	190.6
Accrued unbilled revenues	68.3	66.5
Income taxes receivable	13.5	5.8
Fuel inventories	64.5	84.3
Materials and supplies, at average cost	132.2	80.8
Other	27.6	54.6
Total current assets	642.0	497.0
OTHER PROPERTY AND INVESTMENTS
Investment in unconsolidated affiliates	1,160.6	1,160.4
Other	77.7	76.7
Total other property and investments	1,238.3	1,237.1
PROPERTY, PLANT AND EQUIPMENT
In service	11,604.7	11,041.2
Construction work in progress	632.9	867.5
Total property, plant and equipment	12,237.6	11,908.7
Less accumulated depreciation	3,680.6	3,568.8
Net property, plant and equipment	8,557.0	8,339.9
DEFERRED CHARGES AND OTHER ASSETS
Regulatory assets	256.2	283.0
Other	9.5	55.7
Total deferred charges and other assets	265.7	338.7
TOTAL ASSETS	10,703.0	10,412.7
CURRENT LIABILITIES
Short-term debt	0.0	168.4
Accounts payable	171.8	230.4
Dividends payable	72.9	66.4
Customer deposits	83.1	80.7
Accrued taxes	62.6	44.5
Accrued interest	39.5	44.0
Accrued compensation	39.6	35.9
Long-term debt due within one year	249.9	249.8
Fuel clause over recoveries	39.2	1.7
Other	82.3	28.7
Total current liabilities	840.9	950.5
LONG-TERM DEBT	2,896.8	2,749.6
DEFERRED CREDITS AND OTHER LIABILITIES
Accrued benefit obligations	172.8	192.7
Deferred income taxes	1,291.5	1,227.8
Regulatory liabilities	1,291.0	1,283.4
Other	180.4	157.6
Total deferred credits and other liabilities	2,935.7	2,861.5
Total liabilities	6,673.4	6,561.6
COMMITMENTS AND CONTINGENCIES (NOTE 13)
STOCKHOLDERS' EQUITY
Common stockholders' equity	1,124.0	1,114.8
Retained earnings	2,924.5	2,759.5
Accumulated other comprehensive loss, net of tax	(18.9)	(23.2)
Total stockholders' equity	4,029.6	3,851.1
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 10,703.0	$ 10,412.7