Consolidated Condensed Statements of Income and Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenues
Electric	$ 446	$ 420
Gas	153	127
Total revenues	599	547
Expenses
Fuel	109	101
Purchased power	18	2
Cost of natural gas sold	50	42
Operations and maintenance	128	134
Depreciation and amortization	106	97
Taxes, other than income	54	51
Total expenses	465	427
Income from operations	134	120
Other income
Allowance for equity funds used during construction	10	6
Other income, net	1	1
Total other income	11	7
Interest charges
Interest expense	38	37
Allowance for borrowed funds used during construction	(5)	(3)
Total interest charges	33	34
Income before provision for income taxes	112	93
Provision for income taxes	20	16
Net income	92	77
Comprehensive income	$ 92	$ 77