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CONSOLIDATED STATEMENTS OF EARNINGS - CAD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Operating revenues |  |  |  |  |  |  |  |  |  |  |
Total operating revenues (Note 4) | $ 11,562 | $ 11,345 | $ 10,745 | $ 12,726 | $ 12,889 | $ 9,227 | $ 11,116 | $ 11,146 | $ 46,378 | $ 44,378 | $ 34,560
Operating expenses |  |  |  |  |  |  |  |  |  |  |
Operating and administrative |  |  |  |  |  |  |  |  | 6,792 | 6,442 | 4,358
Depreciation and amortization |  |  |  |  |  |  |  |  | 3,246 | 3,163 | 2,240
Impairment of long-lived assets (Note 8 and Note 11) |  |  |  |  |  |  |  |  | 1,104 | 4,463 | 1,376
Impairment of goodwill (Note 8 and Note 16) |  |  |  |  |  |  |  |  | 1,019 | 102 | 0
Total operating expenses |  |  |  |  |  |  |  |  | 41,562 | 42,807 | 31,979
Operating income | 1,513 | 854 | 1,571 | 878 | (2,961) | 1,490 | 1,684 | 1,358 | 4,816 | 1,571 | 2,581
Income from equity investments (Note 13) |  |  |  |  |  |  |  |  | 1,509 | 1,102 | 428
Other income/(expense) |  |  |  |  |  |  |  |  |  |  |
Net foreign currency gain/(loss) |  |  |  |  |  |  |  |  | (522) | 237 | 91
Gain/(loss) on dispositions |  |  |  |  |  |  |  |  | (46) | 16 | 848
Other |  |  |  |  |  |  |  |  | 516 | 199 | 93
Interest expense (Note 18) |  |  |  |  |  |  |  |  | (2,703) | (2,556) | (1,590)
Earnings before income taxes |  |  |  |  |  |  |  |  | 3,570 | 569 | 2,451
Income tax recovery/(expense) (Note 25) |  |  |  |  |  |  |  |  | (237) | 2,697 | (142)
Earnings | 1,283 | 213 | 1,327 | 510 | 65 | 1,015 | 1,241 | 945 | 3,333 | 3,266 | 2,309
Earnings attributable to noncontrolling interests and redeemable noncontrolling interests |  |  |  |  |  |  |  |  | (451) | (407) | (240)
Earnings attributable to controlling interests | 1,184 | 4 | 1,160 | 534 | 291 | 847 | 1,000 | 721 | 2,882 | 2,859 | 2,069
Preference share dividends |  |  |  |  |  |  |  |  | (367) | (330) | (293)
Earnings attributable to common shareholders | $ 1,089 | $ (90) | $ 1,071 | $ 445 | $ 207 | $ 765 | $ 919 | $ 638 | $ 2,515 | $ 2,529 | $ 1,776
Earnings/(loss) per common share attributable to Enbridge Inc. common shareholders (in dollars per share) | $ 0.60 | $ (0.05) | $ 0.63 | $ 0.26 | $ 0.13 | $ 0.47 | $ 0.56 | $ 0.54 | $ 1.46 | $ 1.66 | $ 1.95
Diluted earnings/(loss) per common share attributable to Enbridge Inc. common shareholders (in dollars per share) | $ 0.60 | $ (0.05) | $ 0.63 | $ 0.26 | $ 0.12 | $ 0.47 | $ 0.56 | $ 0.54 | $ 1.46 | $ 1.65 | $ 1.93
Commodity sales |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  |  |  |  |  |  |  |  |  |  |
Total operating revenues (Note 4) |  |  |  |  |  |  |  |  | $ 27,660 | $ 26,286 | $ 22,816
Operating expenses |  |  |  |  |  |  |  |  |  |  |
Cost of goods and services sold |  |  |  |  |  |  |  |  | 26,818 | 26,065 | 22,409
Gas distribution sales |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  |  |  |  |  |  |  |  |  |  |
Total operating revenues (Note 4) |  |  |  |  |  |  |  |  | 4,360 | 4,215 | 2,486
Operating expenses |  |  |  |  |  |  |  |  |  |  |
Cost of goods and services sold |  |  |  |  |  |  |  |  | 2,583 | 2,572 | 1,596
Transportation and other services revenues |  |  |  |  |  |  |  |  |  |  |
Operating revenues |  |  |  |  |  |  |  |  |  |  |
Total operating revenues (Note 4) |  |  |  |  |  |  |  |  | $ 14,358 | $ 13,877 | $ 9,258

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