Share-Based Payments - Summary Of Measurement Inputs Related To Stock Options (Detail) - Equity Settled Performance Share Plan [Member] - yr	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022
DisclosureOfIndirectMeasurementOfFairValueOfGoodsOrServicesReceivedOtherEquityInstrumentsGrantedDuringPeriod [Line Items]
Expected volatility	72.80%	34.80%
Expected dividend yield
Bottom of range [member]
DisclosureOfIndirectMeasurementOfFairValueOfGoodsOrServicesReceivedOtherEquityInstrumentsGrantedDuringPeriod [Line Items]
Expected term	0.32	0.54
Risk free rate	4.00%	4.00%
Top of range [member]
DisclosureOfIndirectMeasurementOfFairValueOfGoodsOrServicesReceivedOtherEquityInstrumentsGrantedDuringPeriod [Line Items]
Expected term	3.32	2.54
Risk free rate	5.30%	4.30%

Description of expected life other equity instruments granted.

No definition available.

Name:	tdcx_Descriptionofexpectedlifeotherequityinstrumentsgranted
Namespace Prefix:	tdcx_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

Description of expected volatility other equity instruments granted.

No definition available.

Name:	tdcx_Descriptionofexpectedvolatilityotherequityinstrumentsgranted
Namespace Prefix:	tdcx_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

Description of risk free interest rate other equity instruments granted.

No definition available.

Name:	tdcx_Descriptionofriskfreeinterestrateotherequityinstrumentsgranted
Namespace Prefix:	tdcx_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

Disclosure of indirect measurement of fair value of goods or services received other equity instruments granted during period line items.

No definition available.

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

Expected dividend as percentage other equity instruments granted.

No definition available.

Name:	tdcx_Expecteddividendaspercentageotherequityinstrumentsgranted
Namespace Prefix:	tdcx_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

Name:	ifrs-full_TypesOfSharebasedPaymentArrangementsAxis=tdcx_EquitySettledPerformanceSharePlanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Name:	ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: