Consolidated Condensed Balance Sheets (Unaudited) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Property, plant and equipment
Utility plant, at original costs	$ 10,072	$ 10,019
Construction work in progress	262	892
Accumulated depreciation	(2,839)	(2,826)
Utility plant, net	7,233	7,193
Other property	11	10
Total property, plant and equipment, net	7,244	7,203
Current assets
Cash and cash equivalents	10	10
Receivables, less allowance for uncollectibles of $3 and $1 at March 31, 2017 and December 31, 2016, respectively	200	206
Due from affiliates	2	7
Inventories, at average cost
Derivative assets	6	15
Regulatory assets	29	28
Prepayments and other current assets	22	21
Total current assets	440	450
Deferred debits
Regulatory assets	390	393
Other	31	37
Total deferred debits	421	430
Total assets	8,105	8,083
Capitalization
Common stock	2,483	2,456
Accumulated other comprehensive loss	(3)	(3)
Retained earnings	303	311
Total capital	2,783	2,764
Long-term debt	2,163	2,163
Total capitalization	4,946	4,927
Current liabilities
Notes payable	276	170
Accounts payable	154	262
Due to affiliates	19	25
Customer deposits	141	146
Regulatory liabilities	124	154
Accrued interest	38	16
Accrued taxes	29	12
Other	10	11
Total current liabilities	791	796
Deferred credits
Deferred income taxes	1,425	1,407
Investment tax credits	22	11
Regulatory liabilities	584	591
Deferred credits and other liabilities	337	351
Total deferred credits	2,368	2,360
Commitments and Contingencies (see Note 8)
Total liabilities and capitalization	8,105	8,083
Fuel [Member]
Inventories, at average cost
Utility inventories	78	77
Materials and Supplies [Member]
Inventories, at average cost
Utility inventories	93	86
Electric [Member]
Property, plant and equipment
Utility plant, at original costs	8,281	7,624
Gas [Member]
Property, plant and equipment
Utility plant, at original costs	$ 1,529	$ 1,503