Material accounting policy information - Trade and Other Payables (Details)	12 Months Ended
Dec. 31, 2025
Material Accounting Policy Information [Abstract]
Settlement period of trade and other payables (in days)	30 days

The normal settlement period for trade and other payables, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

No definition available.

Name:	tlx_SettlementPeriodOfTradeAndOtherPayables
Namespace Prefix:	tlx_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration