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Equity - Summary of Outstanding Share Options (Detail) | 12 Months Ended
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Dec. 31, 2021 shares $ / shares | Dec. 31, 2020 shares $ / shares
Equity [abstract] |  |
Beginning balance (in shares) | shares | 25,250,000 | 20,152,000
Granted (in shares) | shares | 2,519,455 | 6,314,000
Exercised (in shares) | shares | (3,189,000) | (156,000)
Forfeited (in shares) | shares | (186,000) | (293,000)
Expired (in shares) | shares | (714,000) | (767,000)
Ending balance (in shares) | shares | 23,680,000 | 25,250,000
Vested and exercisable at end of year (in shares) | shares | 16,543,000 | 17,368,000
Outstanding at beginning of year (in dollars per share) | $ / shares | $ 20.61 | $ 23.02
Granted (in dollars per share) | $ / shares | 29.04 | 14.42
Exercised (in dollars per share) | $ / shares | 16.03 | 8.33
Forfeited (in dollars per share) | $ / shares | 25.43 | 20.97
Expired (in dollars per share) | $ / shares | 52.86 | 35.14
Outstanding at ending of year (in dollars per share) | $ / shares | 21.12 | 20.61
Vested and exercisable at end of year (in dollars per share) | $ / shares | $ 21.29 | $ 21.76

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- Definition The weighted average exercise price of share options exercisable in a share-based payment arrangement. [Refer: Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2021-01-01 -Paragraph 45 -Subparagraph b -Clause vii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2021-en-r&anchor=para_45_b_vii&doctype=Standard -URIDate 2021-03-24 + Details
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