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Loans and borrowings - Additional Information (Detail) $ in Millions, $ in Millions |  |  |  | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Aug. 18, 2023 SGD ($) shares | Apr. 12, 2022 | Jan. 01, 2019 | Dec. 31, 2023 SGD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 shares | Jun. 25, 2021 SGD ($) | Jun. 24, 2020 USD ($) shares
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Number of shares issued and fully paid | shares |  |  |  |  |  | 40,858,290 |  |
DBS Bank Ltd [member] |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Refinancing of uncommitted multi-currency revolving credit facility |  |  |  |  |  |  | $ 30.0 |
Ownership interest in the entity, percentage |  |  |  | 76.40% |  |  |  |
Facility limit |  |  |  | $ 30.0 |  |  |  |
DBS Bank Ltd [member] | Hong Leong Asia Limited [member] |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Ownership interest in the entity, percentage |  |  | 35.00% |  |  |  |  |
DBS Bank Ltd [member] | Top of range [member] |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Credit facility with bank |  |  |  | $ 30.0 |  |  |  |
Consolidated tangible net worth ratio |  |  |  | 1.0 times |  |  |  |
DBS Bank Ltd [member] | Bottom of range [member] |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Consolidated tangible net worth |  |  |  |  | $ 400.0 |  |  |
Credit facility with MUFG Singapore Branch [member] |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Ownership interest in the entity, percentage | 76.40% |  |  |  |  |  |  |
Refinancing of unsecured multi-currency revolving credit facility | $ 30.0 |  |  |  |  |  |  |
Number of shares issued and fully paid | shares | 7,290,000 |  |  |  |  |  |  |
Credit facility with MUFG Singapore Branch [member] | Top of range [member] |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Credit facility with bank |  |  |  | $ 30.0 |  |  |  |
Consolidated tangible net worth |  |  |  |  | 120.0 |  |  |
Consolidated tangible net worth ratio |  |  |  | 2.0 times |  |  |  |
Facility limit |  |  |  | $ 30.0 |  |  |  |
Sumitomo branch [Member] |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Refinancing of unsecured multi-currency revolving credit facility |  |  |  |  |  |  |  | $ 30.0
Number of shares issued and fully paid | shares |  |  |  |  |  |  |  | 7,290,000
Sumitomo branch [Member] | United States of America, Dollars |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Credit facility maturity period |  | 6 months |  |  |  |  |  |
Sumitomo branch [Member] | Singapore, Dollars |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Credit facility maturity period |  | 3 months |  |  |  |  |  |
Sumitomo branch [Member] | Top of range [member] |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Credit facility with bank |  |  |  |  | 30.0 |  |  |
Facility limit |  |  |  |  | 30.0 |  |  |
Sumitomo branch [Member] | Bottom of range [member] |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |
Consolidated tangible net worth |  |  |  |  | $ 200.0 |  |  |
Consolidated tangible net worth ratio |  |  |  | 2.0 times |  |  |  |

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