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Earnings per share (Tables) | 3 Months Ended
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Mar. 31, 2017
Earnings Per Share [Abstract] |
Schedule Of Earnings Per Share, Basic And Diluted |
| Three Months Ended |
| March 31 |
(in millions of U.S. dollars, except share and per share data) | 2017 |  |  | 2016 |
Numerator: |  |  |
Net income | $ | 1,093 |  |  | $ | 439 |
Denominator: |  |  |
Denominator for basic earnings per share: |  |  |
Weighted-average shares outstanding | 468,903,086 |  |  | 446,739,586 |
Denominator for diluted earnings per share: |  |  |
Share-based compensation plans | 3,828,604 |  |  | 3,270,156 |
Weighted-average shares outstanding and assumed conversions | 472,731,690 |  |  | 450,009,742 |
Basic earnings per share | $ | 2.33 |  |  | $ | 0.98 |
Diluted earnings per share | $ | 2.31 |  |  | $ | 0.97 |
Potential anti-dilutive share conversions | 969,654 |  |  | 2,074,308 |

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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://www.xbrl.org/2003/role/presentationRef -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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