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Income Tax - Integrated Income Tax Information about Imputation Credit (Detail) - TWD ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016
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Major components of tax expense (income) [abstract] |  |
Credit Account-TSMC | $ 114,264.3 | $ 82,072.6

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

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- Definition Income tax credits imputation balance amount. + References No definition available. + Details
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Namespace Prefix: | tsm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant