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CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) shares in Millions, $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Operating revenues |  |  |  |  |
Electric |  | $ 3,387 | $ 3,699 | $ 8,751 | $ 9,255
Natural gas |  | 245 | 357 | 1,926 | 1,923
Other |  | 30 | 26 | 87 | 79
Total operating revenues |  | 3,662 | 4,082 | 10,764 | 11,257
Operating expenses |  |  |  |  |
Electric fuel and purchased power |  | 1,181 | 1,497 | 3,328 | 3,772
Cost of natural gas sold and transported |  | 70 | 173 | 1,084 | 1,134
Cost of sales — other |  | 14 | 11 | 37 | 32
Operating and maintenance expenses |  | 586 | 611 | 1,864 | 1,827
Conservation and demand side management expenses |  | 76 | 86 | 215 | 259
Depreciation and amortization |  | 618 | 607 | 1,807 | 1,807
Taxes, Other |  | 168 | 173 | 489 | 523
Gain (Loss) Related to Litigation Settlement |  | 34 | 0 | 34 | 0
Total operating expenses |  | 2,747 | 3,158 | 8,858 | 9,354
Operating income |  | 915 | 924 | 1,906 | 1,903
Other income (expense), net |  | 3 | (15) | 19 | (20)
Earnings from equity method investments |  | 7 | 1 | 27 | 27
Allowance for funds used during construction — equity |  | 26 | 20 | 63 | 53
Interest charges and financing costs |  |  |  |  |
Interest charges — includes other financing costs of $8, $8, $24 and $24, respectively |  | 269 | 244 | 790 | 705
Allowance for funds used during construction — debt |  | (14) | (7) | (36) | (19)
Total interest charges and financing costs |  | 255 | 237 | 754 | 686
Income before income taxes |  | 696 | 693 | 1,261 | 1,277
Income tax expense (benefit) |  | 40 | 44 | (101) | (80)
Net income |  | $ 656 | $ 649 | $ 1,362 | $ 1,357
Weighted average common shares outstanding: |  |  |  |  |
Basic (in shares) |  | 552 | 548 | 551 | 546
Diluted (in shares) | [1] | 552 | 548 | 552 | 546
Earnings per average common share: |  |  |  |  |
Basic (in dollars per share) |  | $ 1.19 | $ 1.19 | $ 2.47 | $ 2.48
Diluted (in dollars per share) |  | $ 1.19 | $ 1.18 | $ 2.47 | $ 2.48
[1] | Diluted common shares outstanding included common stock equivalents of 0.3 million for the three months ended Sept. 30, 2023 and 2022. Diluted common shares outstanding included common stock equivalents of 0.2 million and 0.3 million for the nine months ended Sept. 30, 2023 and 2022, respectively.

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