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Cover
 12 Months Ended
Dec. 31, 2019
shares
Cover [Abstract]  
Document Type 20-F
Amendment Flag false
Document Period End Date Dec. 31, 2019
Document Fiscal Year Focus 2019
Document Fiscal Period Focus FY
Trading Symbol TSM
Entity Registrant Name TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD
Entity Central Index Key 0001046179
Current Fiscal Year End Date --12-31
Entity Well-known Seasoned Issuer Yes
Entity Current Reporting Status Yes
Entity Filer Category Large Accelerated Filer
Entity Common Stock, Shares Outstanding 25,930,380,458
Entity Voluntary Filers No
Entity Interactive Data Current Yes
Document Registration Statement false
Document Annual Report true
Document Transition Report false
Document Shell Company Report false
Title of 12(b) Security Common Shares
Security Exchange Name NYSE
Entity Address, Country TW
Entity Incorporation, State or Country Code F5
Entity Shell Company false
Entity Emerging Growth Company false