CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Operating revenues
Electric	$ 733	$ 712
Natural gas	415	332
Other	13	13
Total operating revenues	1,161	1,057
Operating expenses
Electric fuel and purchased power	271	271
Cost of natural gas sold and transported	170	138
Cost of sales — other	3	3
Operating and maintenance expenses	207	205
Demand side management expenses	32	36
Depreciation and amortization	183	156
Taxes (other than income taxes)	66	53
Total operating expenses	932	862
Operating income	229	195
Other income (expense), net	2	(2)
Allowance for funds used during construction — equity	5	9
Interest charges and financing costs
Interest charges — includes other financing costs of $2 and $2, respectively	60	60
Allowance for funds used during construction — debt	(2)	(4)
Total interest charges and financing costs	58	56
Income before income taxes	178	146
Income tax expense	11	17
Net income	$ 167	$ 129