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Capital Stock - Schedule of Information about RSUs and PSUs Granted and Outstanding (Details) | 12 Months Ended
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Dec. 31, 2021 shares $ / shares | Dec. 31, 2020 shares $ / shares | Dec. 31, 2019 shares $ / shares
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of share options granted in share-based payment arrangement (in shares) | 90,000.00 | 0 | 0
Weighted average share price, share options granted (in dollars per share) | $ / shares | $ 4.22 | $ 0 | $ 0
RSUs |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of shares granted (in shares) | 3,000,000.0 | 2,400,000 | 3,000,000.0
Weighted average exercise price of other equity instruments granted in share-based payment arrangement (in usd per share) | $ / shares | $ 8.36 | $ 8.60 | $ 7.88
Number of shares outstanding (in shares) | 4,600,000 | 4,500,000 | 4,600,000
PSUs |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of shares granted (in shares) | 2,900,000 | 1,700,000 | 2,100,000
Weighted average exercise price of other equity instruments granted in share-based payment arrangement (in usd per share) | $ / shares | $ 9.49 | $ 9.88 | $ 8.14
Other equity instruments, granted, percentage of target | 100.00% | 100.00% | 100.00%
Number of shares outstanding (in shares) | 6,100,000 | 4,600,000 | 3,800,000

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- Definition Weighted Average Fair Value At The Grant Date + References No definition available. + Details
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- Definition The number of other equity instruments (ie other than share options) granted in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2021-01-01 -Paragraph 47 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2021-en-r&anchor=para_47_b&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2021-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2021-en-r&anchor=para_45&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The number of other equity instruments (ie other than share options) outstanding in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IFRS -Number 2 -IssueDate 2021-01-01 -Paragraph 45 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2021-en-r&anchor=para_45&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The number of share options granted in a share-based payment arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2021-01-01 -Paragraph 45 -Subparagraph b -Clause ii -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2021-en-r&anchor=para_45_b_ii&doctype=Standard -URIDate 2021-03-24 + Details
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- Definition The weighted average share price used as input to the option pricing model to calculate the fair value of share options granted. [Refer: Option pricing model [member]; Weighted average [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 2 -IssueDate 2021-01-01 -Paragraph 47 -Subparagraph a -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=2&code=ifrs-tx-2021-en-r&anchor=para_47_a_i&doctype=Standard -URIDate 2021-03-24 + Details
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