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STOCK-BASED COMPENSATION - Narrative (Details) shares in Thousands, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 USD ($) shares | Dec. 31, 2020 USD ($) shares | Dec. 31, 2019 USD ($) shares
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Expense from share-based payment transactions with employees | $ 33.0 | $ 67.0 |
Liabilities from share-based payment transactions | 57.0 | 67.0 |
RSUs |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Expense from share-based payment transactions with employees | $ 31.0 | $ 45.0 |
Weighted average remaining contractual life | 9 months | 9 months 29 days |
Number of units outstanding (shares) | shares | 2,518 | 2,623 | 3,110
Liabilities from share-based payment transactions | $ 31.0 | $ 38.6 | $ 41.5
PGSUs |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Number of units outstanding (shares) | shares | 2,873 | 3,962 |
Liabilities from share-based payment transactions | $ 43.0 | $ 52.0 |
Stock options |  |  |
Disclosure of terms and conditions of share-based payment arrangement [line items] |  |  |
Expense from share-based payment transactions with employees | $ 0.0 | $ 0.0 |
Vesting period | 4 years |  |
Exercise period | 7 years |  |
Number of shares available for grant (shares) | shares | 0 | 100 |
Intrinsic value of options exercised | $ 1.0 | $ 2.0 |
Unrecognized compensation cost | $ 0.0 | $ 0.0 |

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- Definition The amount of expense from share-based payment transactions with employees. [Refer: Expense from share-based payment transactions] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2021-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2021-en-r&anchor=para_112_c&doctype=Standard -URIDate 2021-03-24 + Details
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