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Earnings per share - Schedule of Computation of Earnings Per Share (Details) - EUR (€) € / shares in Units, € in Millions, shares in Millions | 6 Months Ended
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Jun. 30, 2023 | Jun. 30, 2022
EPS – Basic |  |
Net profit attributable to shareholders’ equity (€ million) | € 3,548 | € 2,905
Average number of shares (in millions of shares) | 2,523.9 | 2,557.3
EPS - basic (in euros per share) | € 1.41 | € 1.14
EPS – Diluted |  |
Net profit attributable to shareholders’ equity (€ million) | € 3,548 | € 2,905
Diluted average number of shares (in millions of shares) | 2,536.8 | 2,566.2
EPS - diluted (in euros per share) | € 1.40 | € 1.13
Underlying EPS |  |
Net profit attributable to shareholders’ equity (€ million) | € 3,548 | € 2,905
Post-tax impact of non-underlying items attributable to shareholders’ equity (see note 2) | (14) | 535
Underlying profit attributable to shareholders’ equity | € 3,534 | € 3,440
Diluted average number of shares (in millions of shares) | 2,536.8 | 2,566.2
Underlying EPS – diluted (in euros per share) | € 1.39 | € 1.34

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- Definition The amount of profit (loss) attributable to ordinary equity holders of the parent entity (the numerator), divided by the weighted average number of ordinary shares outstanding during the period (the denominator), both adjusted for the effects of all dilutive potential ordinary shares. [Refer: Ordinary shares [member]; Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 33 -IssueDate 2022-03-24 -Paragraph 66 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=33&code=ifrs-tx-2022-en-r&anchor=para_66&doctype=Standard -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 33 -IssueDate 2022-03-24 -Paragraph 67 -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=33&code=ifrs-tx-2022-en-r&anchor=para_67&doctype=Standard -URIDate 2022-03-24 + Details
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- Definition The number of ordinary shares outstanding at the beginning of the period, adjusted by the number of ordinary shares bought back or issued during the period multiplied by a time-weighting factor. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 33 -IssueDate 2022-03-24 -Paragraph 70 -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=33&code=ifrs-tx-2022-en-r&anchor=para_70_b&doctype=Standard -URIDate 2022-03-24 + Details
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