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CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Millions, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Operating revenues |  |  |
Electric | $ 11,446 | $ 12,123 | $ 11,205
Natural Gas | 2,645 | 3,080 | 2,132
Other | 115 | 107 | 94
Total operating revenues | 14,206 | 15,310 | 13,431
Operating expenses |  |  |
Electric fuel and purchased power | 4,278 | 5,005 | 4,733
Cost of natural gas sold and transported | 1,456 | 1,910 | 1,081
Cost of sales — other | 49 | 44 | 38
Operating and maintenance expenses | 2,444 | 2,491 | 2,321
Conservation and demand side management expenses | 286 | 331 | 304
Depreciation and amortization | 2,448 | 2,413 | 2,121
Taxes (other than income taxes) | 657 | 688 | 630
Loss on Comanche Unit 3 litigation | 35 | 0 | 0
Workforce reduction expenses | 72 | 0 | 0
Total operating expenses | 11,725 | 12,882 | 11,228
Operating income | 2,481 | 2,428 | 2,203
Other income (expense), net | 22 | (13) | 5
Earnings from equity method investments | 35 | 36 | 62
Allowance for funds used during construction — equity | 91 | 75 | 73
Interest charges and financing costs |  |  |
Interest charges — includes other financing costs of $32, $31 and $29, respectively | 1,055 | 953 | 842
Allowance for funds used during construction — debt | (51) | (28) | (26)
Total interest charges and financing costs | 1,004 | 925 | 816
Income before income taxes | 1,625 | 1,601 | 1,527
Income tax benefit | (146) | (135) | (70)
Net income | $ 1,771 | $ 1,736 | $ 1,597
Weighted average common shares outstanding: |  |  |
Basic | 552 | 547 | 539
Diluted | 552 | 547 | 540
Earnings per average common share: |  |  |
Basic | $ 3.21 | $ 3.18 | $ 2.96
Diluted | $ 3.21 | $ 3.17 | $ 2.96

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