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CONSOLIDATED STATEMENTS OF EARNINGS $ in Millions, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 CAD ($) $ / shares | Dec. 31, 2021 CAD ($) $ / shares | Dec. 31, 2020 CAD ($) $ / shares
Operating revenues |  |  |
Total operating revenues (Note 4) | $ 53,309 | $ 47,071 | $ 39,087
Operating expenses |  |  |
Operating and administrative | 8,219 | 6,712 | 6,749
Depreciation and amortization | 4,317 | 3,852 | 3,712
Impairment of long-lived assets | 541 | 0 | 0
Impairment of goodwill (Note 16) | 2,465 | 0 | 0
Total operating expenses | 48,131 | 39,266 | 31,130
Operating income | 5,178 | 7,805 | 7,957
Income from equity investments (Note 13) | 2,056 | 1,711 | 1,136
Impairment of equity investments (Note 13) | 0 | (111) | (2,351)
Gain on joint venture merger transaction (Note 13) | 1,076 | 0 | 0
Other income/(expense) (Note 28) | (589) | 979 | 238
Interest expense (Note 18) | (3,179) | (2,655) | (2,790)
Earnings before income taxes | 4,542 | 7,729 | 4,190
Income tax expense (Note 25) | (1,604) | (1,415) | (774)
Earnings | 2,938 | 6,314 | 3,416
(Earnings)/loss attributable to noncontrolling interests | 65 | (125) | (53)
Earnings attributable to controlling interests | 3,003 | 6,189 | 3,363
Preference share dividends | (414) | (373) | (380)
Earnings attributable to common shareholders | $ 2,589 | $ 5,816 | $ 2,983
Earnings per common share attributable to common shareholders (in CAD per share) | $ / shares | $ 1.28 | $ 2.87 | $ 1.48
Diluted earnings per common share attributable to common shareholders (in CAD per share) | $ / shares | $ 1.28 | $ 2.87 | $ 1.48
Commodity sales |  |  |
Operating revenues |  |  |
Total operating revenues (Note 4) | $ 29,150 | $ 26,873 | $ 19,259
Operating expenses |  |  |
Commodity costs and Gas distribution costs | 28,942 | 26,608 | 18,890
Gas distribution revenue |  |  |
Operating revenues |  |  |
Total operating revenues (Note 4) | 5,653 | 4,026 | 3,663
Operating expenses |  |  |
Commodity costs and Gas distribution costs | 3,647 | 2,094 | 1,779
Transportation and other services |  |  |
Operating revenues |  |  |
Total operating revenues (Note 4) | $ 18,506 | $ 16,172 | $ 16,165

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