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Earnings Per Share - Additional Information (Detail) - USD ($) $ in Millions | 1 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2018 | Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2019
Earnings per share [abstract] |  |  |  |
Effect of dilutive shares |  | 11,000,000 | 12,000,000 | 13,000,000
Antidilutive shares |  | 0 | 0 | 0
Number | shares | 266,000,000 |  |  |
Off-market buy-back program | $ 5,200 |  |  | $ 5,220

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- Definition Antidilutive securities with dilutive effect not included in calculation of diluted earnings per share. + References No definition available. + Details
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- Definition The cash outflow to acquire or redeem entity's shares. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 7 -IssueDate 2020-01-01 -Paragraph 17 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=7&code=ifrs-tx-2020-en-r&anchor=para_17_b&doctype=Standard -URIDate 2020-01-01 + Details
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