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v3.20.2

Issued share capital (Detail) - shares shares in Millions | 6 Months Ended | 12 Months Ended
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Jun. 30, 2020 | Jun. 30, 2019 | Dec. 31, 2019
Text block [abstract] |  |  |
Number of shares issued and fully paid, Beginning balance | 1,328.2 | 1,332.7 | 1,332.7
Share cancellations | (32.1) | 0.0 | (4.5)
Number of shares issued and fully paid, Ending balance | 1,296.1 | 1,332.7 | 1,328.2

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- Definition The number of share options exercised in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2019-01-01 -Paragraph 45 -Subparagraph b -Clause iv -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2019-en-r&anchor=para_45_b_iv&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The number of shares issued by the entity, for which full payment has been received. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 79 -Subparagraph a -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_79_a_ii&doctype=Standard -URIDate 2019-03-27 + Details
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Balance Type: | na
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- Definition Text block [abstract] + References No definition available. + Details
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