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Income Tax - Expiry Period Information of Unused Operating Loss Carryforward (Detail) $ in Millions | 12 Months Ended
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Dec. 31, 2016 TWD ($)
Disclosure of unused operating loss carryforward [line items] |
Operating loss carryforward for which no deferred tax assets recognized | $ 178.1
Expiration period one [member] |
Disclosure of unused operating loss carryforward [line items] |
Operating loss carryforward for which no deferred tax assets recognized | $ 136.7
Expiration period one [member] | Bottom of range [member] |
Disclosure of unused operating loss carryforward [line items] |
Operating loss carryforward expiry period | 1 year
Expiration period one [member] | Top of range [member] |
Disclosure of unused operating loss carryforward [line items] |
Operating loss carryforward expiry period | 4 years
Expiration period two [member] |
Disclosure of unused operating loss carryforward [line items] |
Operating loss carryforward for which no deferred tax assets recognized | $ 41.4
Expiration period two [member] | Bottom of range [member] |
Disclosure of unused operating loss carryforward [line items] |
Operating loss carryforward expiry period | 5 years
Expiration period two [member] | Top of range [member] |
Disclosure of unused operating loss carryforward [line items] |
Operating loss carryforward expiry period | 10 years

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- Definition Disclosure of unused tax losses for which no deferred tax assets recognized line items. + References No definition available. + Details
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- Definition Operating loss carryforwards expiry period. + References No definition available. + Details
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- Definition Operating loss carryforward for which no deferred tax assets have been recognized. + References No definition available. + Details
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