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Note 8 - Dividends Distribution (Details Textual) - USD ($) $ / shares in Units, $ in Millions | Nov. 20, 2019 | Oct. 30, 2019 | May 22, 2019 | Nov. 21, 2018 | May 23, 2018 | Nov. 22, 2017 | May 24, 2017 | Nov. 23, 2016 | May 06, 2019 | May 02, 2018 | May 03, 2017
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Statement Line Items [Line Items] |  |  |  |  |  |  |  |  |  |  |
Dividends recognised as distributions to owners per share (in dollars per share) |  | $ 0.13 |  |  |  |  |  |  |  |  |
Dividends payable, amount per ads (in dollars per share) |  | $ 0.26 |  |  |  |  |  |  |  |  |
Dividends recognised as distributions to owners | $ 153 |  | $ 484 |  | $ 484 |  | $ 484 |  |  |  |
Dividends payable, amount per share including interim dividend (in dollars per share) |  |  |  |  |  |  |  |  | $ 0.41 | $ 0.41 | $ 0.41
Dividends payable, amount per ADS including interim dividend (in dollars per share) |  |  |  |  |  |  |  |  | $ 0.82 | $ 0.82 | $ 0.82
Dividends paid, ordinary shares per share (in dollars per share) |  |  | $ 0.28 | $ 0.13 | $ 0.28 | $ 0.13 | $ 0.28 | $ 0.13 |  |  |
Dividends paid, per ADS (in dollars per share) |  |  | $ 0.56 | $ 0.26 | $ 0.56 | $ 0.26 | $ 0.56 | $ 0.26 |  |  |

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- Definition The amount of dividends recognised as distributions to owners. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 107 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_107&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The amount of dividends paid per ordinary share. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 34 -IssueDate 2019-01-01 -Paragraph 16A -Subparagraph f -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=34&code=ifrs-tx-2019-en-r&anchor=para_16A_f&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The amount, per share, of dividends recognised as distributions to owners. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 107 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_107&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The amount of dividends paid per American Depositary Security ("ADS"). One ADS equals two shares. + References No definition available. + Details
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- Definition The per American Depositary Security "ADS" amount of a dividend declared or approved, but not yet paid. One ADS equals two shares. + References No definition available. + Details
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- Definition The per American Depositary Security "ADS" amount of a dividend payable including an interim dividend paid previously. One ADS equals two shares. + References No definition available. + Details
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- Definition The per share amount of a dividend payable including an interim dividend previously paid. + References No definition available. + Details
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