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Income Tax - Integrated Income Tax Information about Imputation Credit (Detail) - TWD ($) $ in Millions	Dec. 31, 2017	Dec. 31, 2016
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