Material accounting policy information - Business Combinations (Details)	12 Months Ended
Dec. 31, 2025
Material Accounting Policy Information [Abstract]
Maximum measurement period (in years)	1 year

The maximum period of measurement from the date of acquisition to the date the group obtains complete information about facts and circumstances that existed as of the acquisition date, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

No definition available.

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