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Net Revenue - Summary of Disaggregation of Revenue from Contracts with Customers Based on Resolution (Detail) - TWD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue from contracts with customers | $ 1,587,415.0 | $ 1,339,254.8 | $ 1,069,985.4
Wafer [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue from contracts with customers | 1,405,300.3 | 1,178,456.3 | 927,317.3
Wafer [member] | 5-nanometer [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue from contracts with customers | 262,327.4 | 90,934.5 | 0.0
Wafer [member] | 7-nanometer [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue from contracts with customers | 440,383.1 | 394,837.0 | 249,548.1
Wafer [member] | 10-nanometer [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue from contracts with customers | 660.0 | 3,403.1 | 23,266.4
Wafer [member] | 16-nanometer [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue from contracts with customers | 191,058.9 | 197,959.0 | 186,700.9
Wafer [member] | 20-nanometer [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue from contracts with customers | 5,668.8 | 8,450.9 | 9,535.8
Wafer [member] | 28-nanometer [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue from contracts with customers | 153,066.6 | 149,367.7 | 149,578.7
Wafer [member] | 40/45-nanometer [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue from contracts with customers | 103,413.6 | 103,176.5 | 93,366.3
Wafer [member] | 65-nanometer [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue from contracts with customers | 66,467.9 | 61,226.7 | 69,250.0
Wafer [member] | 90-nanometer [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue from contracts with customers | 32,260.3 | 29,380.4 | 25,624.2
Wafer [member] | 0.11/0.13 micron [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue from contracts with customers | 40,558.5 | 33,197.1 | 22,947.3
Wafer [member] | 0.15/0.18 micron [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue from contracts with customers | 86,700.3 | 86,008.5 | 77,564.5
Wafer [member] | 0.25 micron and above [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue from contracts with customers | $ 22,734.9 | $ 20,514.9 | $ 19,935.1

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- Definition The amount of revenue from contracts with customers. A customer is a party that has contracted with an entity to obtain goods or services that are an output of the entity’s ordinary activities in exchange for consideration. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2021-01-01 -Paragraph 113 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2021-en-r&anchor=para_113_a&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2021-01-01 -Paragraph 114 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2021-en-r&anchor=para_114&doctype=Standard -URIDate 2021-03-24 + Details
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