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CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) shares in Millions, $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Operating revenues |  |  |  |  |
Electric |  | $ 2,923 | $ 2,597 | $ 5,556 | $ 5,467
Natural gas |  | 476 | 449 | 1,566 | 1,096
Other |  | 25 | 22 | 53 | 46
Total operating revenues |  | 3,424 | 3,068 | 7,175 | 6,609
Operating expenses |  |  |  |  |
Electric fuel and purchased power |  | 1,181 | 1,047 | 2,275 | 2,433
Cost of natural gas sold and transported |  | 251 | 218 | 961 | 517
Cost of sales — other |  | 11 | 9 | 21 | 17
O&M expenses |  | 614 | 600 | 1,216 | 1,184
Conservation and demand side management expenses |  | 81 | 71 | 173 | 144
Depreciation and amortization |  | 638 | 528 | 1,200 | 1,049
Taxes, Other |  | 179 | 157 | 350 | 320
Total operating expenses |  | 2,955 | 2,630 | 6,196 | 5,664
Operating income |  | 469 | 438 | 979 | 945
Other (expense) income, net |  | (6) | 3 | (5) | 8
Earnings from equity method investments |  | 11 | 20 | 26 | 34
Allowance for funds used during construction — equity |  | 20 | 18 | 33 | 32
Interest charges and financing costs |  |  |  |  |
Interest charges — includes other financing costs of $8, $7, $16 and $14, respectively |  | 247 | 212 | 461 | 417
Allowance for funds used during construction — debt |  | (7) | (6) | (12) | (11)
Total interest charges and financing costs |  | 240 | 206 | 449 | 406
Income before income taxes |  | 254 | 273 | 584 | 613
Income tax benefit |  | (74) | (38) | (124) | (60)
Net income |  | $ 328 | $ 311 | $ 708 | $ 673
Weighted average common shares outstanding: |  |  |  |  |
Basic (in shares) |  | 546 | 539 | 545 | 539
Diluted (in shares) | [1] | 546 | 539 | 546 | 539
Earnings per average common share: |  |  |  |  |
Basic (in dollars per share) |  | $ 0.60 | $ 0.58 | $ 1.30 | $ 1.25
Diluted (in dollars per share) |  | $ 0.60 | $ 0.58 | $ 1.30 | $ 1.25
[1] | Diluted common shares outstanding included common stock equivalents of 0.3 million for the three months ended June 30, 2022 and 2021, respectively. Diluted common shares outstanding included common stock equivalents of 0.2 million and 0.3 million for the six months ended June 30, 2022 and 2021, respectively.

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