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Disclosure of information on segments - Reconciliation of segment assets (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | --- | ---
Disclosure of information on segments [Line Items] |  |  |
Assets | $ 3,979,617 | $ 4,107,274 | $ 4,217,221
Elimination Of assets Of Equity Accounted Investees, Not Consolidated | (10,564,402) | (10,501,411) | (9,963,853)
Elimination of the Subsidiaries And Associates of The Parent Company | (1,005,368) | (1,111,454) | (1,184,240)
Elimination of Segment Assets Intercompany Receivables | (57,810) | (64,708) | (32,444)
Elimination of Other Segment Assets | 17,486 | 23,210 | 28,234
Operating Segments [Member] |  |  |
Disclosure of information on segments [Line Items] |  |  |
Assets | $ 15,589,711 | $ 15,761,637 | $ 15,369,524

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