Consolidated Condensed Statements of Income and Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Revenues
Electric	$ 597	$ 586	$ 1,581	$ 1,509
Gas	96	103	309	330
Total revenues	693	689	1,890	1,839
Expenses
Fuel	158	173	454	426
Purchased power	21	39	36	81
Cost of natural gas sold	44	40	115	126
Operations and maintenance	127	134	386	388
Depreciation and amortization	89	83	262	245
Taxes, other than income	53	53	151	149
Total expenses	492	522	1,404	1,415
Income from operations	201	167	486	424
Other income
Allowance for equity funds used during construction	0	6	1	18
Other income, net	2	2	6	4
Total other income	2	8	7	22
Interest charges
Interest on long-term debt	27	28	83	85
Other interest	3	2	7	4
Allowance for borrowed funds used during construction	0	(4)	(1)	(9)
Total interest charges	30	26	89	80
Income before provision for income taxes	173	149	404	366
Provision for income taxes	67	49	156	127
Net income	106	100	248	239
Other comprehensive income, net of tax
Gain on cash flow hedges	0	1	1	1
Total other comprehensive income, net of tax	0	1	1	1
Comprehensive income	$ 106	$ 101	$ 249	$ 240