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Commitments - Additional Information (Detail) - SGD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Commitment [Abstract]
Outstanding donation commitment	$ 1.0	$ 1.0

X

- Definition

Commitment.

+ References

No definition available.

+ Details

Name:	tdcx_CommitmentAbstract
Namespace Prefix:	tdcx_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Outstanding donation commitment.

+ References

No definition available.

+ Details

Name:	tdcx_OutstandingDonationCommitment
Namespace Prefix:	tdcx_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant