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CONTRACTUAL COMMITMENTS - Narrative (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019
Disclosure of contingent liabilities [line items] |  |
Contractual commitments | $ 820 | $ 913
Asset management fee as percent per quarter | 0.3125% |
Asset management fee, percent | 1.25% |
Less than one year |  |
Disclosure of contingent liabilities [line items] |  |
Contractual capital commitments, maturity, percent | 31.00% |
1 to 5 years |  |
Disclosure of contingent liabilities [line items] |  |
Contractual capital commitments, maturity, percent | 43.00% |
Thereafter |  |
Disclosure of contingent liabilities [line items] |  |
Contractual capital commitments, maturity, percent | 26.00% |

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- Definition The amount of capital commitments for which the entity has entered into a contract. [Refer: Capital commitments] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_112_c&doctype=Standard -URIDate 2020-01-01 + Details
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