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Loans and borrowings - Additional Information (Detail)
$ in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2024
SGD ($)
shares
Feb. 10, 2025
USD ($)
shares
Dec. 31, 2024
USD ($)
shares
Jun. 30, 2024
USD ($)
Dec. 31, 2023
shares
Aug. 18, 2023
SGD ($)
Jun. 25, 2021
SGD ($)
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] | Bottom of range [member]              
Disclosure of detailed information about borrowings [line items]              
Consolidated tangible net worth     $ 400.0        
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            
Credit facility with MUFG Singapore Branch [member]              
Disclosure of detailed information about borrowings [line items]              
Ownership interest in the entity, percentage 76.40%            
Facility limit $ 30.0            
Refinancing of unsecured multi-currency revolving credit facility           $ 30.0  
Number of shares issued and fully paid | shares 7,290,000   7,290,000        
Credit facility with MUFG Singapore Branch [member] | Bottom of range [member]              
Disclosure of detailed information about borrowings [line items]              
Consolidated tangible net worth     $ 120.0        
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 ratio 2.0 times            
Sumitomo branch [Member] | Uncommitted and unsecured multi currency short term revolving credit facility agreement [Member]              
Disclosure of detailed information about borrowings [line items]              
Refinancing of uncommitted multi-currency revolving credit facility   $ 30.0          
Number of shares issued and fully paid | shares   7,290,000          
Sumitomo branch [Member] | Bottom of range [member]              
Disclosure of detailed information about borrowings [line items]              
Consolidated tangible net worth     200.0 $ 200.0      
Sumitomo branch [Member] | Top of range [member]              
Disclosure of detailed information about borrowings [line items]              
Credit facility with bank     $ 30.0        
Consolidated tangible net worth ratio 2.0 times