CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Operating revenues
Electric	$ 2,941	$ 2,771	$ 7,430	$ 7,345
Natural gas	219	222	1,082	1,324
Other	22	20	67	62
Total operating revenues	3,182	3,013	8,579	8,731
Operating expenses
Electric fuel and purchased power	981	952	2,611	2,679
Cost of natural gas sold and transported	54	55	425	646
Cost of sales — other	11	9	28	28
Operating and maintenance expenses	579	580	1,708	1,764
Conservation and demand side management expenses	73	75	215	212
Depreciation and amortization	513	447	1,449	1,319
Taxes, Other	158	137	453	429
Total operating expenses	2,369	2,255	6,889	7,077
Operating income	813	758	1,690	1,654
Other income (expense), net	1	8	(6)	14
Equity earnings of unconsolidated subsidiaries	12	10	29	29
Allowance for funds used during construction — equity	30	15	91	55
Interest charges and financing costs
Interest charges — includes other financing costs of $7, $6, $21 and $19, respectively	221	199	628	578
Other financing costs	7	6	21	19
Allowance for funds used during construction — debt	(11)	(7)	(33)	(27)
Total interest charges and financing costs	210	192	595	551
Income before income taxes	646	599	1,209	1,201
Income tax expense	43	72	24	121
Net income	$ 603	$ 527	$ 1,185	$ 1,080
Weighted average common shares outstanding:
Basic (in shares)	526	519	526	517
Diluted (in shares)	528	521	527	518
Earnings per average common share:
Basic (in dollars per share)	$ 1.15	$ 1.02	$ 2.25	$ 2.09
Diluted (in dollars per share)	$ 1.14	$ 1.01	$ 2.25	$ 2.08