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Net Income per ordinary share | 12 Months Ended
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Dec. 31, 2022
Net Income per Ordinary Share [Abstract] |
Net income per ordinary share | Net income per ordinary share Basic net income per ordinary share is calculated by dividing net income by the weighted average number of ordinary shares outstanding for that period. The dilutive effect is calculated using the treasury stock method by dividing net income by the weighted average number of ordinary shares outstanding for that period plus shares applicable to options and conditional shares (dilutive potential ordinary shares). The calculation of diluted net income per ordinary share does not assume exercise of options when exercise would be anti-dilutive. Excluded from the diluted weighted average number of shares outstanding calculation are cumulative preference shares contingently issuable to the preference share foundation, since they represent a different class of stock than the ordinary shares. The basic and diluted net income per ordinary share has been calculated as follows:
Year ended December 31 (€, in millions, except per share data) | 2020 | 2021 |  | 2022
Net income | 3,553.7 |  | 5,883.2 |  |  | 5,624.2 |
Weighted average number of shares outstanding | 418.3 |  | 409.8 |  |  | 397.7 |
Basic net income per ordinary share | 8.49 |  | 14.36 |  |  | 14.14 |
Weighted average number of shares outstanding | 418.3 |  | 409.8 |  |  | 397.7 |
Plus shares applicable to options and conditional shares | 0.8 |  | 0.6 |  |  | 0.3 |
Diluted weighted average number of shares | 419.1 |  | 410.4 |  |  | 398.0 |
Diluted net income per ordinary share | 8.48 |  | 14.34 |  |  | 14.13 |

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- Definition The entire disclosure for earnings per share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 3 -URI https://asc.fasb.org/extlink&oid=109243012&loc=SL65017193-207537 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -URI https://asc.fasb.org/topic&trid=2144383 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3630-109257 + Details
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