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Earnings per share (Tables) | 6 Months Ended
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Jun. 30, 2020
Earnings Per Share [Abstract] |
Schedule Of Earnings Per Share, Basic And Diluted |
| Three Months Ended |  |  |  | Six Months Ended |  |
| June 30 |  |  |  | June 30 |  |
(in millions of U.S. dollars, except share and per share data) | 2020 |  | 2019 |  | 2020 |  | 2019
Numerator: |  |  |  |  |  |  |
Net income (loss) | $ | (331) |  |  | $ | 1,150 |  |  | $ | (79) |  |  | $ | 2,190 |
Denominator: |  |  |  |  |  |  |
Denominator for basic earnings per share: |  |  |  |  |  |  |
Weighted-average shares outstanding | 451,402,807 |  |  | 457,224,455 |  |  | 451,635,733 |  |  | 458,010,447 |
Denominator for diluted earnings per share: |  |  |  |  |  |  |
Share-based compensation plans (1) | — |  |  | 2,945,237 |  |  | — |  |  | 2,863,109 |
Weighted-average shares outstanding and assumed conversions | 451,402,807 |  |  | 460,169,692 |  |  | 451,635,733 |  |  | 460,873,556 |
Basic earnings (loss) per share | $ | (0.73) |  |  | $ | 2.52 |  |  | $ | (0.17) |  |  | $ | 4.78 |
Diluted earnings (loss) per share | $ | (0.73) |  |  | $ | 2.50 |  |  | $ | (0.17) |  |  | $ | 4.75 |
Potential anti-dilutive share conversions | 8,378,447 |  |  | 2,660,925 |  |  | 6,583,319 |  |  | 5,037,959 |

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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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