Consolidated Condensed Statements of Income and Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Revenues
Electric	$ 442	$ 424
Gas	111	127
Total revenues	553	551
Expenses
Fuel	131	115
Purchased power	7	14
Cost of natural gas sold	36	50
Operations and maintenance	128	121
Depreciation and amortization	85	81
Taxes, other than income	49	49
Total expenses	436	430
Income from operations	117	121
Other income
Allowance for equity funds used during construction	1	6
Other income, net	2	1
Total other income	3	7
Interest charges
Interest on long-term debt	28	29
Interest expense	2	1
Allowance for borrowed funds used during construction	(1)	(2)
Total interest charges	29	28
Income before provision for income taxes	91	100
Provision for income taxes	35	37
Net income	56	63
Comprehensive income	$ 56	$ 63