CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Operating revenues
Electric	$ 2,286	$ 2,249	$ 4,489	$ 4,574
Natural gas	280	308	863	1,102
Other	20	20	45	42
Total operating revenues	2,586	2,577	5,397	5,718
Operating expenses
Electric fuel and purchased power	833	813	1,630	1,727
Cost of natural gas sold and transported	86	112	371	591
Cost of sales — other	8	10	17	19
Operating and maintenance expenses	550	586	1,129	1,184
Conservation and demand side management expenses	68	65	142	137
Depreciation and amortization	473	439	936	872
Taxes (other than income taxes)	146	142	295	292
Total operating expenses	2,164	2,167	4,520	4,822
Operating income	422	410	877	896
Other income (expense), net	5	2	(7)	6
Equity earnings of unconsolidated subsidiaries	6	9	17	19
Allowance for funds used during construction — equity	37	20	61	40
Interest charges and financing costs
Interest charges — includes other financing costs of $7, $6, $14 and $13, respectively	208	189	407	379
Other financing costs	7	6	14	13
Allowance for funds used during construction — debt	(12)	(10)	(22)	(20)
Total interest charges and financing costs	196	179	385	359
Income before income taxes	274	262	563	602
Income tax (benefit) expense	(13)	24	(19)	49
Net income	$ 287	$ 238	$ 582	$ 553
Weighted average common shares outstanding:
Basic (in shares)	527	516	526	515
Diluted (in shares)	527	518	527	517
Earnings per average common share:
Basic (in dollars per share)	$ 0.54	$ 0.46	$ 1.10	$ 1.07
Diluted (in dollars per share)	$ 0.54	$ 0.46	$ 1.10	$ 1.07