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Events after the reporting period - Additional information (Detail)
$ in Thousands, $ in Millions
Mar. 29, 2023
USD ($)
Dec. 31, 2022
SGD ($)
Dec. 31, 2021
SGD ($)
Statements [Line Items]      
Financial assets at fair value through profit or loss   $ 29,776 $ 23,983
Major business combination [member] | Mangrove Insurance Guernsey PCC Limited [Member]      
Statements [Line Items]      
Financial assets at fair value through profit or loss $ 17.9