CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017
CURRENT ASSETS
Cash and cash equivalents	$ 94.3	$ 14.4
Accounts receivable, less reserve of $1.7 and $1.5, respectively	174.7	190.6
Accrued unbilled revenues	62.6	66.5
Income taxes receivable	9.9	5.8
Fuel inventories	57.6	84.3
Materials and supplies, at average cost	126.7	80.8
Fuel clause under recoveries	2.0	0.0
Other	29.5	54.6
Total current assets	557.3	497.0
OTHER PROPERTY AND INVESTMENTS
Investment in unconsolidated affiliates	1,177.5	1,160.4
Other	73.4	76.7
Total other property and investments	1,250.9	1,237.1
PROPERTY, PLANT AND EQUIPMENT
In service	11,994.8	11,041.2
Construction work in progress	376.4	867.5
Total property, plant and equipment	12,371.2	11,908.7
Less accumulated depreciation	3,727.4	3,568.8
Net property, plant and equipment	8,643.8	8,339.9
DEFERRED CHARGES AND OTHER ASSETS
Regulatory assets	285.8	283.0
Other	10.8	55.7
Total deferred charges and other assets	296.6	338.7
TOTAL ASSETS	10,748.6	10,412.7
CURRENT LIABILITIES
Short-term debt	0.0	168.4
Accounts payable	239.3	230.4
Dividends payable	72.9	66.4
Customer deposits	83.6	80.7
Accrued taxes	44.0	44.5
Accrued interest	44.5	44.0
Accrued compensation	47.8	35.9
Long-term debt due within one year	250.0	249.8
Fuel clause over recoveries	0.3	1.7
Other	87.0	28.7
Total current liabilities	869.4	950.5
LONG-TERM DEBT	2,896.9	2,749.6
DEFERRED CREDITS AND OTHER LIABILITIES
Accrued benefit obligations	225.7	192.7
Deferred income taxes	1,310.9	1,227.8
Regulatory liabilities	1,270.7	1,283.4
Other	169.9	157.6
Total deferred credits and other liabilities	2,977.2	2,861.5
Total liabilities	6,743.5	6,561.6
COMMITMENTS AND CONTINGENCIES (NOTE 14)
STOCKHOLDERS' EQUITY
Common stockholders' equity	1,127.7	1,114.8
Retained earnings	2,906.3	2,759.5
Accumulated other comprehensive loss, net of tax	(28.9)	(23.2)
Total stockholders' equity	4,005.1	3,851.1
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 10,748.6	$ 10,412.7