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Significant Subsequent Events - Additional Information (Detail) $ in Millions | 1 Months Ended |  |  |
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Apr. 30, 2025 USD ($) | Jan. 31, 2025 TWD ($) | Dec. 31, 2024 TWD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 TWD ($)
Disclosure Of Nonadjusting Events After Reporting Period [Line Items] |  |  |  |  |
Investments accounted for using equity method |  |  | $ 8,879 | $ 271,000,000 | $ 8,252
TRF 1 L.P [Member] |  |  |  |  |
Disclosure Of Nonadjusting Events After Reporting Period [Line Items] |  |  |  |  |
Investments accounted for using equity method |  | $ 300 |  |  |
Astranis Space Technologies Corp. [Member] | Top of Range [Member] |  |  |  |  |
Disclosure Of Nonadjusting Events After Reporting Period [Line Items] |  |  |  |  |
Amount approved for satellite investment project | $ 115,000,000 |  |  |  |

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