Consolidated Condensed Balance Sheets (Unaudited) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Property, plant and equipment
Utility plant, at original costs	$ 10,548	$ 10,427
Construction work in progress	301	263
Accumulated depreciation	(3,046)	(2,994)
Utility plant, net	7,502	7,433
Other property	11	11
Total property, plant and equipment, net	7,513	7,444
Current assets
Cash and cash equivalents	16	13
Receivables, less allowance for uncollectibles of $1 at both March 31, 2018 and December 31, 2017	225	257
Due from affiliates	4	5
Inventories, at average cost
Regulatory assets	67	77
Prepayments and other current assets	19	13
Total current assets	479	515
Deferred debits
Regulatory assets	351	356
Other	52	49
Total deferred debits	403	405
Total assets	8,395	8,364
Capitalization
Common stock	2,755	2,645
Accumulated other comprehensive loss	(2)	(2)
Retained earnings	301	335
Total capital	3,054	2,978
Long-term debt	1,860	1,860
Total capitalization	4,914	4,838
Current liabilities
Long-term debt due within one year	304	304
Notes payable	300	305
Accounts payable	174	233
Due to affiliates	17	21
Customer deposits	130	131
Regulatory liabilities	67	58
Accrued interest	37	14
Accrued taxes	29	12
Other	24	44
Total current liabilities	1,082	1,122
Long-term liabilities
Deferred income taxes	841	825
Regulatory liabilities	1,218	1,227
Deferred credits and other liabilities	340	352
Total long-term liabilities	2,399	2,404
Commitments and Contingencies (see Note 8)
Total liabilities and capitalization	8,395	8,364
Fuel [Member]
Inventories, at average cost
Utility inventories	55	60
Materials and Supplies [Member]
Inventories, at average cost
Utility inventories	93	90
Electric [Member]
Property, plant and equipment
Utility plant, at original costs	8,606	8,555
Gas [Member]
Property, plant and equipment
Utility plant, at original costs	$ 1,641	$ 1,609