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THE COVID-19 PANDEMIC AND ITS IMPACT ON TERNIUM - Narrative (Details) $ in Billions | Dec. 31, 2021 USD ($)
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Unusual or Infrequent Items, or Both, Disclosure1 [Abstract] |
Net cash | $ 1.2

X
- Definition Net cash + References No definition available. + Details
Name: | tx_NetCash
Namespace Prefix: | tx_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Unusual or Infrequent Items, or Both, Disclosure1 + References No definition available. + Details
Name: | tx_UnusualOrInfrequentItemsOrBothDisclosure1Abstract
Namespace Prefix: | tx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration