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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