Consolidated Condensed Statements of Income and Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenues
Electric	$ 542	$ 499	$ 984	$ 923
Gas	102	100	213	227
Total revenues	644	599	1,197	1,150
Expenses
Fuel	165	138	296	253
Purchased power	8	28	15	42
Cost of natural gas sold	35	36	71	86
Operations and maintenance	131	133	259	254
Depreciation and amortization	88	81	173	162
Taxes, other than income	49	47	98	96
Total expenses	476	463	912	893
Income from operations	168	136	285	257
Other income
Allowance for equity funds used during construction	0	6	1	12
Other income, net	2	1	4	2
Total other income	2	7	5	14
Interest charges
Interest on long-term debt	28	28	56	57
Other interest	2	1
Interest expense			4	2
Allowance for borrowed funds used during construction	0	(3)	(1)	(5)
Total interest charges	30	26	59	54
Income before provision for income taxes	140	117	231	217
Provision for income taxes	54	41	89	78
Net income	86	76	142	139
Comprehensive income	$ 86	$ 76	143	139
Other comprehensive income, net of tax
Gain on cash flow hedges			1	0
Total other comprehensive income, net of tax			$ 1	$ 0