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Summary of Significant Accounting Policies - Detail Information of Subsidiaries (Detail) | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
TSMC North America [member] |  |
Disclosure of subsidiaries [line items] |  |
Main Businesses and Products | Selling and marketing of integrated circuits and other semiconductor devices | Selling and marketing of integrated circuits and other semiconductor devices
Establishment and Operating Location | San Jose, California, U.S.A. | San Jose, California, U.S.A.
Percentage of Ownership | 100.00% | 100.00%
TSMC Europe B.V. [member] |  |
Disclosure of subsidiaries [line items] |  |
Main Businesses and Products | Customer service and supporting activities | Customer service and supporting activities
Establishment and Operating Location | Amsterdam, the Netherlands | Amsterdam, the Netherlands
Percentage of Ownership | 100.00% | 100.00%
TSMC Japan Limited [member] |  |
Disclosure of subsidiaries [line items] |  |
Main Businesses and Products | Customer service and supporting activities | Customer service and supporting activities
Establishment and Operating Location | Yokohama, Japan | Yokohama, Japan
Percentage of Ownership | 100.00% | 100.00%
TSMC Korea Limited [member] |  |
Disclosure of subsidiaries [line items] |  |
Main Businesses and Products | Customer service and supporting activities | Customer service and supporting activities
Establishment and Operating Location | Seoul, Korea | Seoul, Korea
Percentage of Ownership | 100.00% | 100.00%
TSMC Partners, Ltd. [member] |  |
Disclosure of subsidiaries [line items] |  |
Main Businesses and Products | Investing in companies involved in the design, manufacture, and other related business in the semiconductor industry and other investment activities | Investing in companies involved in the design, manufacture, and other related business in the semiconductor industry and other investment activities
Establishment and Operating Location | Tortola, British Virgin Islands | Tortola, British Virgin Islands
Percentage of Ownership | 100.00% | 100.00%
TSMC Global, Ltd. [member] |  |
Disclosure of subsidiaries [line items] |  |
Main Businesses and Products | Investment activities | Investment activities
Establishment and Operating Location | Tortola, British Virgin Islands | Tortola, British Virgin Islands
Percentage of Ownership | 100.00% | 100.00%
TSMC China Company Limited [member] |  |
Disclosure of subsidiaries [line items] |  |
Main Businesses and Products | Manufacturing, selling, testing and computer-aided design of integrated circuits and other semiconductor devices | Manufacturing, selling, testing and computer-aided design of integrated circuits and other semiconductor devices
Establishment and Operating Location | Shanghai, China | Shanghai, China
Percentage of Ownership | 100.00% | 100.00%
TSMC Nanjing Company Limited [member] |  |
Disclosure of subsidiaries [line items] |  |
Main Businesses and Products | Manufacturing, selling, testing and computer-aided design of integrated circuits and other semiconductor devices | Manufacturing, selling, testing and computer-aided design of integrated circuits and other semiconductor devices
Establishment and Operating Location | Nanjing, China | Nanjing, China
Percentage of Ownership | 100.00% | 100.00%
VisEra Technologies Company Ltd. [member] |  |
Disclosure of subsidiaries [line items] |  |
Main Businesses and Products | Engaged in manufacturing electronic spare parts and in researching, developing, designing, manufacturing, selling, packaging and testing of color filter | Engaged in manufacturing electronic spare parts and in researching, developing, designing, manufacturing, selling, packaging and testing of color filter
Establishment and Operating Location | Hsin-Chu, Taiwan | Hsin-Chu, Taiwan
Percentage of Ownership | 87.00% | 87.00%
VentureTech Alliance Fund II, L.P. [member] |  |
Disclosure of subsidiaries [line items] |  |
Main Businesses and Products | Investing in new start-up technology companies | Investing in new start-up technology companies
Establishment and Operating Location | Cayman Islands | Cayman Islands
Percentage of Ownership | 98.00% | 98.00%
VentureTech Alliance Fund III, L.P. [member] |  |
Disclosure of subsidiaries [line items] |  |
Main Businesses and Products | Investing in new start-up technology companies | Investing in new start-up technology companies
Establishment and Operating Location | Cayman Islands | Cayman Islands
Percentage of Ownership | 98.00% | 98.00%
TSMC Solar Europe GmbH [member] |  |
Disclosure of subsidiaries [line items] |  |
Main Businesses and Products | Selling of solar related products and providing customer service | Selling of solar related products and providing customer service
Establishment and Operating Location | Hamburg, Germany | Hamburg, Germany
Percentage of Ownership |  | 100.00%
TSMC Development, Inc. [member] |  |
Disclosure of subsidiaries [line items] |  |
Main Businesses and Products | Investing in companies involved in the manufacturing related business in the semiconductor industry | Investing in companies involved in the manufacturing related business in the semiconductor industry
Establishment and Operating Location | Delaware, U.S.A. | Delaware, U.S.A.
Percentage of Ownership | 100.00% | 100.00%
TSMC Technology, Inc. [member] |  |
Disclosure of subsidiaries [line items] |  |
Main Businesses and Products | Engineering support activities | Engineering support activities
Establishment and Operating Location | Delaware, U.S.A. | Delaware, U.S.A.
Percentage of Ownership | 100.00% | 100.00%
TSMC Design Technology Canada Inc. [member] |  |
Disclosure of subsidiaries [line items] |  |
Main Businesses and Products | Engineering support activities | Engineering support activities
Establishment and Operating Location | Ontario, Canada | Ontario, Canada
Percentage of Ownership | 100.00% | 100.00%
InveStar Semiconductor Development Fund, Inc. [member] |  |
Disclosure of subsidiaries [line items] |  |
Main Businesses and Products | Investing in new start-up technology companies | Investing in new start-up technology companies
Establishment and Operating Location | Cayman Islands | Cayman Islands
Percentage of Ownership | 97.00% | 97.00%
InveStar Semiconductor Development Fund, Inc. (II) LDC. [member] |  |
Disclosure of subsidiaries [line items] |  |
Main Businesses and Products | Investing in new start-up technology companies | Investing in new start-up technology companies
Establishment and Operating Location | Cayman Islands | Cayman Islands
Percentage of Ownership | 97.00% | 97.00%
WaferTech, LLC [member] |  |
Disclosure of subsidiaries [line items] |  |
Main Businesses and Products | Manufacturing, selling and testing of integrated circuits and other semiconductor devices | Manufacturing, selling and testing of integrated circuits and other semiconductor devices
Establishment and Operating Location | Washington, U.S.A. | Washington, U.S.A.
Percentage of Ownership | 100.00% | 100.00%
Growth Fund Limited [member] |  |
Disclosure of subsidiaries [line items] |  |
Main Businesses and Products | Investing in new start-up technology companies | Investing in new start-up technology companies
Establishment and Operating Location | Cayman Islands | Cayman Islands
Percentage of Ownership | 100.00% | 100.00%

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