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Equity - Summary of Capital Stock (Detail) - shares shares in Thousands | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Disclosure of classes of share capital [line items] |  |  |
Capital stock | 16,806,658 | 16,806,658 | 16,806,658
Series A shares [member] |  |  |
Disclosure of classes of share capital [line items] |  |  |
Capital stock | 7,936,628 | 7,936,628 | 7,936,628
Series D share [member] |  |  |
Disclosure of classes of share capital [line items] |  |  |
Capital stock | 4,668,366 | 4,668,366 | 4,668,366
Series L share [member] |  |  |
Disclosure of classes of share capital [line items] |  |  |
Capital stock | 2,626,040 | 2,626,040 | 2,626,040
Series B share Member |  |  |
Disclosure of classes of share capital [line items] |  |  |
Capital stock | 1,575,624 | 1,575,624 | 1,575,624

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