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Bonds Payable - Summary of Bonds Payable (Detail) $ in Thousands, $ in Thousands | Dec. 31, 2019 TWD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 TWD ($)
--- | --- | --- | ---
Disclosure of detailed information about borrowings [line items] |  |  |
Bonds payable | $ 36,522,155 | $ 1,221,068 | $ 16,985,936
Noncurrent portion | 36,272,155 | 1,212,710 | 16,985,936
Less: current portion of bonds payable | 250,000 | 8,358 | 0
Cost [member] |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Bonds payable | 36,557,200 | 1,222,240 | 17,000,000
Cost [member] | Repayable at maturity in January 2021 [member] |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Bonds payable | 7,000,000 | 234,035 | 7,000,000
Cost [member] | Repayable at maturity in January 2023 [member] |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Bonds payable | 2,000,000 | 66,867 | 2,000,000
Cost [member] | Repayable at maturity in January 2022 [member] |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Bonds payable | 3,700,000 | 123,704 | 3,700,000
Cost [member] | Repayable at maturity in January 2024 [member] |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Bonds payable | 4,300,000 | 143,765 | 4,300,000
Cost [member] | Repayable at maturity in April 2024 [Member] |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Bonds payable | 6,500,000 | 217,319 | 0
Cost [member] | Repayable at maturity in April 2026 [Member] |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Bonds payable | 3,500,000 | 117,018 | 0
Cost [member] | Repayable at maturity in October 2022 [Member] |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Bonds payable | 6,204,800 | 207,449 | 0
Cost [member] | Repayable at maturity in October 2024 [Member] |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Bonds payable | 3,102,400 | 103,725 | 0
Cost [member] | Repayable at maturity in December 2020 [Member] |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Bonds payable | 250,000 | 8,358 | 0
Discounts on bonds payable [member] |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |
Bonds payable | $ 35,045 | $ 1,172 | $ 14,064

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- Definition The amount of current bonds issued and the current portion of non-current bonds issued. [Refer: Bonds issued] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2019-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2019-en-r&anchor=para_112_c&doctype=Standard -URIDate 2019-03-27 + Details
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