Lease Arrangements - Future Minimum Lease Payments under Non-cancellable Operating Leases (Detail) $ in Millions	Dec. 31, 2018 TWD ($)
Disclosure of maturity analysis of operating lease payments [line items]
Minimum lease payments	$ 20,849.6
Not later than 1 year [member]
Disclosure of maturity analysis of operating lease payments [line items]
Minimum lease payments	5,824.1
Later than 1 year and not later than 5 years [member]
Disclosure of maturity analysis of operating lease payments [line items]
Minimum lease payments	5,834.9
Later than 5 years [member]
Disclosure of maturity analysis of operating lease payments [line items]
Minimum lease payments	$ 9,190.6

The amount of future minimum lease payments payable under non-cancellable operating leases. Minimum lease payments are payments over the lease term that the lessee is or can be required to make, excluding contingent rent, costs for services and taxes to be paid by, and reimbursed to, the lessor, together with: (a) for a lessee, any amounts guaranteed by the lessee or by a party related to the lessee; or (b) for a lessor, any residual value guaranteed to the lessor by: (i) the lessee; (ii) a party related to the lessee; or (iii) a third party unrelated to the lessor that is financially capable of discharging the obligations under the guarantee.

No definition available.

Name:	tsm_MinimumLeasePaymentPayableUndernoncancellableOperatingLease
Namespace Prefix:	tsm_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant