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COLLATERAL SECURITY FOR MORTGAGE DEBT AND BANK LOANS (Detail Textual) - USD ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
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Disclosure Of Collateral [Abstract] |  |  |
Carrying amount for vessels as collateral security | $ 1,259 | $ 1,115 | $ 1,329

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- Definition Represents the carrying amount of vessels for collateral held as security. + References No definition available. + Details
Name: | trmd_CarryingAmountOfVesselsForCollateralHeldAsSecurity
Namespace Prefix: | trmd_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
Name: | trmd_DisclosureOfCollateralAbstract
Namespace Prefix: | trmd_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration