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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
REVENUES |  |  |  |
Natural gas | $ 1,488 | $ 1,587 | $ 7,560 | $ 5,611
Electric | 1,250 | 1,357 | 3,331 | 3,663
Energy-related businesses | 596 | 673 | 2,338 | 1,710
Total revenues | 3,334 | 3,617 | 13,229 | 10,984
Operating expenses: |  |  |  |
Operation and maintenance | (1,383) | (1,206) | (3,958) | (3,454)
Aliso Canyon litigation and regulatory matters | 0 | (122) | 0 | (259)
Depreciation and amortization | (563) | (506) | (1,651) | (1,500)
Franchise fees and other taxes | (169) | (162) | (509) | (474)
Other income (expense), net | 3 | (40) | 75 | (3)
Interest income | 19 | 18 | 60 | 58
Interest expense | (312) | (282) | (995) | (796)
Income before income taxes and equity earnings | 323 | 165 | 2,175 | 1,194
Income tax benefit (expense) | 52 | (21) | (499) | (435)
Equity earnings | 479 | 417 | 1,086 | 1,118
Net income | 854 | 561 | 2,762 | 1,877
Earnings attributable to noncontrolling interests | (122) | (65) | (435) | (187)
Preferred dividends | (11) | (11) | (33) | (33)
Preferred dividends of subsidiary | 0 | 0 | (1) | (1)
Earnings attributable to common shares | $ 721 | $ 485 | $ 2,293 | $ 1,656
Basic EPS: |  |  |  |
Earnings (in dollars per share) | $ 1.14 | $ 0.77 | $ 3.64 | $ 2.63
Weighted-average common shares outstanding (in shares) | 630,036 | 629,447 | 629,963 | 630,603
Diluted EPS: |  |  |  |
Earnings (in dollars per share) | $ 1.14 | $ 0.77 | $ 3.63 | $ 2.62
Weighted-average common shares outstanding (in shares) | 632,324 | 632,175 | 632,231 | 632,914
Natural gas |  |  |  |
Operating expenses: |  |  |  |
Operating expenses | $ (260) | $ (505) | $ (3,254) | $ (1,835)
Electric fuel and purchased power |  |  |  |
Operating expenses: |  |  |  |
Operating expenses | (183) | (307) | (385) | (763)
Energy-related businesses |  |  |  |
Operating expenses: |  |  |  |
Operating expenses | $ (163) | $ (340) | $ (437) | $ (764)

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