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Share-Based Payment Arrangements (Tables)
 12 Months Ended
Dec. 31, 2021
Text Block [Abstract]  
Summary of vesting conditions of Employee RSAs performance metrics
TSMC’s TSR relative to the
TSR of S&P 500 IT Index
   
Ratio of Shares to be Vested
Above the Index by X percentage points    50% + X * 2.5%, with the maximum of 100%
Equal to the Index    50%
Below the Index by X percentage points    50% - X * 2.5%, with the minimum of 0%