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Earnings per share | 9 Months Ended
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Sep. 30, 2019
Earnings Per Share [Abstract] |
Earnings per share | Earnings per share
| Three Months Ended |  |  | Nine Months Ended |
| September 30 |  |  | September 30 |
(in millions of U.S. dollars, except share and per share data) | 2019 |  |  | 2018 |  |  | 2019 |  |  | 2018 |
Numerator: |  |  |  |  |  |  |
Net income | $ | 1,091 |  |  | $ | 1,231 |  |  | $ | 3,281 |  |  | $ | 3,607 |
Denominator: |  |  |  |  |  |  |
Denominator for basic earnings per share: |  |  |  |  |  |  |
Weighted-average shares outstanding | 454,975,143 |  |  | 462,981,973 |  |  | 456,987,560 |  |  | 464,644,013 |
Denominator for diluted earnings per share: |  |  |  |  |  |  |
Share-based compensation plans | 3,175,226 |  |  | 3,034,525 |  |  | 2,937,026 |  |  | 3,360,511 |
Weighted-average shares outstanding and assumed conversions | 458,150,369 |  |  | 466,016,498 |  |  | 459,924,586 |  |  | 468,004,524 |
Basic earnings per share | $ | 2.40 |  |  | $ | 2.66 |  |  | $ | 7.18 |  |  | $ | 7.76 |
Diluted earnings per share | $ | 2.38 |  |  | $ | 2.64 |  |  | $ | 7.13 |  |  | $ | 7.71 |
Potential anti-dilutive share conversions | 575,039 |  |  | 3,763,844 |  |  | 3,874,310 |  |  | 3,467,000 |
Excluded from weighted-average shares outstanding and assumed conversions is the impact of securities that would have been anti-dilutive during the respective periods.

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI http://asc.fasb.org/topic&trid=2144383 + Details
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