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Operating Segments Information | 12 Months Ended
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Dec. 31, 2020
Text Block [Abstract] |
Operating Segments Information |
38. | OPERATING SEGMENTS INFORMATION
| a. | Operating segments, segment revenue and operating results
TSMC’s chief operating decision makers periodically review operating results, focusing on operating income generated by foundry segment. Operating results are used for resource allocation and/or performance assessment. As a result, the Company has only one operating segment, the foundry segment. The foundry segment engages mainly in the manufacturing, selling, packaging, testing and computer-aided design of integrated circuits and other semiconductor devices and the manufacturing of masks. The basis for the measurement of income from operations is the same as that for the preparation of financial statements. Please refer to the consolidated statements of comprehensive income for the related segment revenue and operating results.
| b. | Geographic and major customers’ information were as follows:
| 1) | Geographic information
|  | December 31, |  |  | December 31, |
|  | 2019 |  |  | 2020 |
|  | NT$ |  |  | NT$ |
Noncurrent Assets |  | (In Millions) |  |  | (In Millions) |
Taiwan |  | $ | 1,344,352.6 |  |  | $ | 1,569,080.4 |
United States |  |  | 8,850.1 |  |  |  | 9,455.5 |
China |  |  | 38,586.6 |  |  |  | 34,456.4 |
Europe, the Middle East and Africa |  |  | 186.2 |  |  |  | 174.2 |
Japan |  |  | 27.1 |  |  |  | 327.2 |
Others |  |  | 3.1 |  |  |  | 3.0 |
|  | $ | 1,392,005.7 |  |  | $ | 1,613,496.7 |
Noncurrent assets include property, plant and equipment, right-of-use assets, intangible assets and other noncurrent assets.
| 2) | Major custom e rs representing at least 10% of net revenue
|  | Years Ended December 31 |
|  | 2018 |  |  | 2019 |  |  | 2020 |
|  | Amount |  |  | % |  |  | Amount |  |  | % |  |  | Amount |  |  | % |
|  | NT$ |  |  |  |  |  | NT$ |  |  |  |  |  | NT$ |  |  |  |
|  | (In Millions) |  |  |  |  |  | (In Millions) |  |  |  |  |  | (In Millions) |  |  |  |
Customer A |  | $ | 224,690.7 |  |  |  | 22 |  |  | $ | 247,213.3 |  |  |  | 23 |  |  | $ | 336,775.5 |  |  |  | 25 |
Customer B |  |  | 83,885.6 |  |  |  | 8 |  |  |  | 152,876.9 |  |  |  | 14 |  |  |  | 167,390.8 |  |  |  | 12 |

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- Definition The entire disclosure for operating segments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2020-01-01 -Section Disclosure -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=8&code=ifrs-tx-2020-en-r&doctype=Standard&dita_xref=IFRS08_g20-24_TI -URIDate 2020-01-01 + Details
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