CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Operating revenues
Electric	$ 2,203	$ 2,325
Natural gas	583	794
Other	25	22
Total operating revenues	2,811	3,141
Operating expenses
Electric fuel and purchased power	797	914
Cost of natural gas sold and transported	285	479
Cost of sales — other	9	10
Operating and maintenance expenses	579	597
Conservation and demand side management expenses	74	72
Depreciation and amortization	463	433
Taxes (other than income taxes)	149	150
Total operating expenses	2,356	2,655
Operating income	455	486
Other (expense) income, net	(11)	4
Equity earnings of unconsolidated subsidiaries	11	9
Allowance for funds used during construction — equity	23	20
Interest charges and financing costs
Interest charges — includes other financing costs of $7 and $6, respectively	199	189
Allowance for funds used during construction — debt	(10)	(10)
Total interest charges and financing costs	189	179
Income before income taxes	289	340
Income tax (benefit) expense	(6)	25
Net income	$ 295	$ 315
Weighted average common shares outstanding:
Basic (in shares)	526	515
Diluted (in shares)	527	516
Earnings per average common share:
Basic (in dollars per share)	$ 0.56	$ 0.61
Diluted (in dollars per share)	$ 0.56	$ 0.61