Consolidated Condensed Balance Sheets (Unaudited) - USD ($) $ in Millions	Sep. 30, 2018	Dec. 31, 2017
Property, plant and equipment
Utility plant, at original costs	$ 11,150	$ 10,427
Construction work in progress	528	263
Accumulated depreciation	(3,156)	(2,994)
Utility plant, net	7,994	7,433
Other property	12	11
Total property, plant and equipment, net	8,006	7,444
Current assets
Cash and cash equivalents	22	13
Receivables, less allowance for uncollectibles	304	257
Due from affiliates	3	5
Inventories, at average cost
Regulatory assets	46	77
Prepayments and other current assets	9	13
Total current assets	528	515
Deferred debits
Regulatory assets	340	356
Other	43	49
Total deferred debits	383	405
Total assets	8,917	8,364
Capitalization
Common stock	2,980	2,645
Accumulated other comprehensive loss	(1)	(2)
Retained earnings	357	335
Total capital	3,336	2,978
Long-term debt	2,505	1,860
Total capitalization	5,841	4,838
Current liabilities
Long-term debt due within one year	0	304
Notes payable	111	305
Accounts payable	222	233
Due to affiliates	15	21
Customer deposits	131	131
Regulatory liabilities	96	58
Accrued interest	37	14
Accrued taxes	70	12
Other	17	44
Total current liabilities	699	1,122
Long-term liabilities
Deferred income taxes	787	825
Regulatory liabilities	1,202	1,227
Deferred credits and other liabilities	388	352
Total long-term liabilities	2,377	2,404
Commitments and Contingencies (see Note 8)
Total liabilities and capitalization	8,917	8,364
Fuel [Member]
Inventories, at average cost
Utility inventories	44	60
Materials and Supplies [Member]
Inventories, at average cost
Utility inventories	100	90
Electric [Member]
Property, plant and equipment
Utility plant, at original costs	8,925	8,555
Gas [Member]
Property, plant and equipment
Utility plant, at original costs	$ 1,697	$ 1,609