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Disposal of Subsidiaries - Summary of Gain on Disposal of Subsidiaries (Detail) ¥ in Thousands, $ in Thousands | 1 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2020 CNY (¥) | Dec. 31, 2021 TWD ($) | Dec. 31, 2020 TWD ($)
Disclosure of gain from disposals of subsidiaries [line items] |  |  |
Total consideration | ¥ | ¥ 966,000 |  |
SPIL Cayman Holdings Limited [member] |  |  |
Disclosure of gain from disposals of subsidiaries [line items] |  |  |
Total consideration |  | $ 36,939,133 | $ 4,078,844
Net assets disposed of |  | (20,167,999) | (3,113,151)
Reclassification of accumulated exchange difference from equity to profit or loss due to the loss of control |  | 569,284 | (162,940)
Gain on disposal of |  | $ 17,340,418 | $ 802,753

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- Definition Reclassification of Subsidiaries Net Assets From Equity to Accumulated Difference of Profit Due to The Loss Of Control Subsidiaries. + References No definition available. + Details
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