Contract Assets - Additional Information (Details) - SGD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020
Contract assets [abstract]
Increase decrease asset due to expansion of business.	$ 2.5	$ 20.3

Increase decrease asset due to expansion of business.

No definition available.

Name:	tdcx_IncreaseDecreaseAssetDueToExpansionOfBusiness
Namespace Prefix:	tdcx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration