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Net Loss Per Share (Tables) | 12 Months Ended
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Dec. 31, 2019
Earnings Per Share [Abstract] |
Schedule of Income (Loss) Per Share |
| Year Ended December 31,
| 2019 $ |  | 2018 $ |  | 2017 $
Net loss attributable to shareholders of Teekay Corporation for basic loss per share | (310,577 | ) |  | (79,237 | ) |  | (163,276 | )
Reduction in net earnings due to dilutive impact of stock-based compensation in Teekay LNG, Altera and Teekay Tankers and stock purchase warrants in Altera | — |  |  | — |  |  | (90 | )
Net loss attributable to shareholders of Teekay Corporation for diluted loss per share | (310,577 | ) |  | (79,237 | ) |  | (163,366 | )
Weighted average number of common shares | 100,719,224 |  |  | 99,670,176 |  |  | 86,335,473 |
Dilutive effect of stock-based compensation | — |  |  | — |  |  | — |
Common stock and common stock equivalents | 100,719,224 |  |  | 99,670,176 |  |  | 86,335,473 |
Loss per common share - basic and diluted | (3.08 | ) |  | (0.79 | ) |  | (1.89 | )

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- Definition Tabular disclosure of an entity's basic and diluted earnings per share calculations, including a reconciliation of numerators and denominators of the basic and diluted per-share computations for income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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