5440282025-09-135440282025-09-132025-09-13iso4217:INRxbrli:pureTATA TECHNOLOGIES LIMITEDTATATECHNewAcquisition (including agreement to acquire)2025-09-13Exchange rate of Euro/INR of Rs.103.60 for converting the Euro numbers into INR as of 12 September 20252025-09-13Tata Technologies Pte. Limited, SingaporeMaterial SubsidiaryES-Tec GmbH3730000000680000000800000000falsefalsefalsefalseEngineering, Research & Development (ER&D) services.ES-Tec Group is a leading high-end automotive engineering service company in Germany with a specialized focus and deep know-how in Driver Assistance, Comfort Electronics & E-Mobility. This acquisition significantly enhances TTL’s ER&D capabilities and broadens its end-to-end value proposition for global automotive customers. ES-Tec Group’s presence in Germany will strengthen TTL’s growing presence in the region with a strong local talent pool and deep-expertise on systems engineering. The transaction is expected to be EPS accretive from the first full year of operations itselfYesAnti-trust filings required under the competition laws of Germany and Morocco, and such other regulatory approvals as may be required.true12/31/2025Cash776000000001Established in 2006, and headquartered in Wolfsburg, Germany, ES-Tec Group provides high-end automotive engineering services with deep know-how in Driver Assistance, Comfort Electronics & E-Mobility. It has more than 300 skilled professionals with deep expertise on systems engineering. Revenue for the last 3 completed years (for the period ended 31 December); €24.7 Mn (CY22), €30.6 Mn (CY23), and €36.1 Mn (CY24)Germany