CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
CURRENT ASSETS
Cash and cash equivalents	$ 0.0	$ 0.3
Accounts receivable, less reserve of $1.1 and $1.5, respectively	136.6	173.0
Accounts receivable - unconsolidated affiliates	5.8	2.5
Accrued unbilled revenues	56.2	59.7
Income taxes receivable	13.4	19.4
Fuel inventories	86.3	79.8
Materials and supplies, at average cost	82.9	81.7
Fuel clause under recoveries	73.4	51.3
Other	83.5	81.8
Total current assets	538.1	549.5
OTHER PROPERTY AND INVESTMENTS
Investment in unconsolidated affiliates	1,158.9	1,158.6
Other	75.5	73.6
Total other property and investments	1,234.4	1,232.2
PROPERTY, PLANT AND EQUIPMENT
In service	10,730.8	10,690.0
Construction work in progress	673.3	495.1
Total property, plant and equipment	11,404.1	11,185.1
Less accumulated depreciation	3,503.8	3,488.9
Net property, plant and equipment	7,900.3	7,696.2
DEFERRED CHARGES AND OTHER ASSETS
Regulatory assets	403.1	404.8
Other	59.0	56.9
Total deferred charges and other assets	462.1	461.7
TOTAL ASSETS	10,134.9	9,939.6
CURRENT LIABILITIES
Short-term debt	128.2	236.2
Accounts payable	244.3	205.4
Dividends payable	60.4	60.4
Customer deposits	78.6	77.7
Accrued taxes	25.2	41.3
Accrued interest	33.0	40.4
Accrued compensation	25.5	45.1
Long-term debt due within one year	224.8	224.7
Other	95.0	96.0
Total current liabilities	915.0	1,027.2
LONG-TERM DEBT	2,703.2	2,405.8
DEFERRED CREDITS AND OTHER LIABILITIES
Accrued benefit obligations	276.5	274.8
Deferred income taxes	2,332.0	2,334.5
Regulatory liabilities	306.7	299.7
Other	157.1	153.8
Total deferred credits and other liabilities	3,072.3	3,062.8
Total liabilities	6,690.5	6,495.8
COMMITMENTS AND CONTINGENCIES (NOTE 12)
STOCKHOLDERS' EQUITY
Common stockholders' equity	1,107.9	1,105.8
Retained earnings	2,365.2	2,367.3
Accumulated other comprehensive loss, net of tax	(28.7)	(29.3)
Total stockholders' equity	3,444.4	3,443.8
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 10,134.9	$ 9,939.6