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Summary of Significant Accounting Policies - Summary of Subsidiaries (Parenthetical) (Detail) ₱ in Millions | Dec. 10, 2018 | Nov. 28, 2018 seat | Jan. 15, 2018 $ / shares | Sep. 14, 2018 PHP (₱)
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MVP Rewards Loyalty Solutions, Inc [Member] |  |  |  |
Disclosure of subsidiaries [Line Items] |  |  |  |
Initial investment | ₱ |  |  |  | ₱ 50
Voyager Innovations Holdings, Pte. Ltd. [Member] |  |  |  |
Disclosure of subsidiaries [Line Items] |  |  |  |
Percentage of Ownership | 48.74% | 53.87% |  |
Number of board seats | seat |  | 2 |  |
3rd Brand Pte. Ltd., or 3rd Brand [Member] | Voyager Innovations Holdings, Pte. Ltd. [Member] |  |  |  |
Disclosure of subsidiaries [Line Items] |  |  |  |
Percentage of ownership interest in subsidiary acquired |  |  | 15.00% |
Consideration for minority interest | $ / shares |  |  | $ 1.00 |

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