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Significant Contingencies and Unrecognized Contract Commitments - Additional Information (Detail) ¥ in Millions, $ in Millions, $ in Millions	Jan. 27, 2022 TWD ($)	Dec. 31, 2023 TWD ($)	Dec. 31, 2023 CNY (¥)	Jul. 31, 2023 CNY (¥)	Jul. 31, 2023 USD ($)
Disclosure of contingent liabilities [line items]
Amounts available under unused letters of credit		$ 33,200
Litigations, electricity supply and customs tax guarantee		2,200
Patent license agreements and development contracts of intellectual property, contract amount		3,800
Royalties and development fees not yet recognized		1,200
Construction contracts, amount		70,600
Construction contracts not yet recognized		$ 38,400
Final Decision By The Authority [Member] | Micron Technology [Member] | Intellecutal Property And Commercial Court [Member]
Disclosure of contingent liabilities [line items]
Amount of fine	$ 20
Probation period	2 years
UNITED SEMICONDUCTOR (XIAMEN) CO., LTD. (USCXM) [member]
Disclosure of contingent liabilities [line items]
Amount of investment in subsidiaries | ¥			¥ 8,300
Repurchase from the other investors of their investments | ¥			¥ 4,900
Investments in subsidiaries by entity				¥ 4,120	$ 660
Additional Investment by entity subsidiary				740	$ 120
Cumulative investment in subsidiary by group | ¥				¥ 4,900

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- Definition

The amount of contractual commitments for the acquisition of intangible assets.

+ References

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- Definition

The amount of contractual commitments for the acquisition of property, plant and equipment. [Refer: Property, plant and equipment]

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The amount of investments in subsidiaries, joint ventures and associates in an entity's separate financial statements. [Refer: Associates [member]; Joint ventures [member]; Subsidiaries [member]; Investments in subsidiaries reported in separate financial statements]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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The amount of undrawn borrowing facilities that may be available for future operating activities and to settle capital commitments. [Refer: Capital commitments]

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The amount of the portion of the construction contracts not yet recognized.

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Investments in subsidiaries by entity.

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Litigations, electricity supply and customs tax guarantee amount.

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Probation period.

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Repurchase from the other investors of their investments.

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The amount of the portion of royalties and development fees not yet recognized.

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