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Net Revenue - Summary of Disaggregation of Revenue from Contracts with Customers Based on Platform Type (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
Smartphone [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue from contracts with customers | 695,091.2 | 645,303.6 | 523,612.9
High performance computing [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue from contracts with customers | 587,780.1 | 439,810.0 | 315,822.3
Internet of things [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue from contracts with customers | 133,006.0 | 110,355.2 | 86,342.7
Automotive [Member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue from contracts with customers | 67,076.4 | 44,367.5 | 47,914.5
Digital consumer electronics [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue from contracts with customers | 55,577.2 | 54,555.7 | 53,733.4
Others [member] |  |  |
Disclosure of disaggregation of revenue from contracts with customers [line items] |  |  |
Revenue from contracts with customers | $ 48,884.1 | $ 44,862.8 | $ 42,559.6

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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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