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Additional Information of Expenses by Nature - Summary of Profit Sharing Bonus to Employees and Compensation to Directors (Detail) - TWD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Expense by Nature [line items] |  |  |
Resolution date of TSMC's Board of Directors in its meeting | Feb. 09, 2021 | Feb. 11, 2020 | Feb. 19, 2019
Bonus to Employees [member] |  |  |
Expense by Nature [line items] |  |  |
Profit sharing bonus to employees | $ 34,753.2 | $ 23,165.7 | $ 23,570.0
Compensation to Directors [member] |  |  |
Expense by Nature [line items] |  |  |
Compensation to directors | $ 509.8 | $ 360.4 | $ 349.3

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- Definition Compensation to directors. + References No definition available. + Details
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- Definition Line items represent concepts included in a table. These concepts are used to disclose the amount of expenses aggregated according to their nature (for example, depreciation, purchases of materials, transport costs, employee benefits and advertising costs), and not reallocated among functions within the entity. + References No definition available. + Details
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- Definition Profit sharing bonus. + References No definition available. + Details
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- Definition Resolution date of board meeting. + References No definition available. + Details
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- Details
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- Details
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