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Basis of Preparation - Subsidiaries of the Company (Detail) | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
APWC General Holdings Limited [Member] |  |
Disclosure of subsidiaries [Line Items] |  |
Place of incorporation and operations | The British Virgin Islands |
Percentage of equity interest | 100.00% | 100.00%
PRC (APWC) Holding Ltd. [Member] |  |
Disclosure of subsidiaries [Line Items] |  |
Place of incorporation and operations | The British Virgin Islands |
Percentage of equity interest | 100.00% | 100.00%
Samray Inc. [Member] |  |
Disclosure of subsidiaries [Line Items] |  |
Place of incorporation and operations | The British Virgin Islands |
Percentage of equity interest | 100.00% | 100.00%
Siam (APWC) Holdings Ltd. [Member] |  |
Disclosure of subsidiaries [Line Items] |  |
Place of incorporation and operations | The British Virgin Islands |
Percentage of equity interest | 100.00% | 100.00%
Moon View Ltd [Member] |  |
Disclosure of subsidiaries [Line Items] |  |
Place of incorporation and operations | The British Virgin Islands |
Percentage of equity interest | 100.00% | 100.00%
Trigent Investment Holdings Limited [Member] |  |
Disclosure of subsidiaries [Line Items] |  |
Place of incorporation and operations | The British Virgin Islands |
Percentage of equity interest | 100.00% | 100.00%
Crown Century Holdings Ltd. [Member] |  |
Disclosure of subsidiaries [Line Items] |  |
Place of incorporation and operations | The British Virgin Islands |
Percentage of equity interest | 100.00% | 100.00%
Sigma Cable Company (Private) Limited [Member] |  |
Disclosure of subsidiaries [Line Items] |  |
Place of incorporation and operations | Singapore |
Percentage of equity interest | 98.30% | 98.30%
Epan Industries Pte Ltd. [Member] |  |
Disclosure of subsidiaries [Line Items] |  |
Place of incorporation and operations | Singapore |
Percentage of equity interest | 98.30% | 98.30%
Singvale Pte Ltd. [Member] |  |
Disclosure of subsidiaries [Line Items] |  |
Place of incorporation and operations | Singapore |
Percentage of equity interest | 100.00% | 100.00%
Ningbo Pacific Cable Co., Ltd. [Member] |  |
Disclosure of subsidiaries [Line Items] |  |
Place of incorporation and operations | The People's Republic of China |
Percentage of equity interest | 97.93% | 97.93%
Shanghai Yayang Electric Co., Ltd. [Member] |  |
Disclosure of subsidiaries [Line Items] |  |
Place of incorporation and operations | The People's Republic of China |
Percentage of equity interest | 68.75% | 68.75%
Pacific Electric Wire & Cable (Shenzhen) Co., Ltd. [Member] |  |
Disclosure of subsidiaries [Line Items] |  |
Place of incorporation and operations | The People's Republic of China |
Percentage of equity interest | 97.93% | 97.93%
Crown Century Holdings Limited ("CCH (HK)") [Member] |  |
Disclosure of subsidiaries [Line Items] |  |
Place of incorporation and operations | Hong Kong |
Percentage of equity interest | 97.93% | 97.93%
Australia Pacific Electric Cable Pty Limited [Member] |  |
Disclosure of subsidiaries [Line Items] |  |
Place of incorporation and operations | Australia |
Percentage of equity interest | 98.06% | 98.06%
Charoong Thai Wire and Cable Public Company Limited [Member] |  |
Disclosure of subsidiaries [Line Items] |  |
Place of incorporation and operations | Thailand |
Percentage of equity interest | 50.93% | 50.93%
Siam Pacific Electric Wire & Cable Company Limited [Member] |  |
Disclosure of subsidiaries [Line Items] |  |
Place of incorporation and operations | Thailand |
Percentage of equity interest | 50.93% | 50.93%
Double D Cable Company Limited [Member] |  |
Disclosure of subsidiaries [Line Items] |  |
Place of incorporation and operations | Thailand |
Percentage of equity interest | 50.93% | 50.93%
Hard Lek Limited. [Member] |  |
Disclosure of subsidiaries [Line Items] |  |
Place of incorporation and operations | Thailand |
Percentage of equity interest | 73.98% | 73.98%
APWC (Thailand) Co., Ltd. [Member] |  |
Disclosure of subsidiaries [Line Items] |  |
Place of incorporation and operations | Thailand |
Percentage of equity interest | 99.48% | 99.48%
PEWC (Thailand) Co., Ltd. [Member] |  |
Disclosure of subsidiaries [Line Items] |  |
Place of incorporation and operations | Thailand |
Percentage of equity interest | 99.48% | 99.48%
CTW Beta Co., Ltd. [Member] |  |
Disclosure of subsidiaries [Line Items] |  |
Place of incorporation and operations | Thailand |
Percentage of equity interest | 50.89% | 50.89%
Siam Fiber Optics Co., Ltd. [Member] |  |
Disclosure of subsidiaries [Line Items] |  |
Place of incorporation and operations | Thailand |
Percentage of equity interest | 45.84% | 45.84%
Asia Pacific New Energy Corporation Limited [Member] |  |
Disclosure of subsidiaries [Line Items] |  |
Place of incorporation and operations | Taiwan |
Percentage of equity interest | 100.00% | 100.00%
YASHIN Energy Corporation Limited [Member] |  |
Disclosure of subsidiaries [Line Items] |  |
Place of incorporation and operations | Taiwan |
Percentage of equity interest | 100.00% | 100.00%
YADING Energy Corporation Limited [Member] |  |
Disclosure of subsidiaries [Line Items] |  |
Place of incorporation and operations | Taiwan |
Percentage of equity interest | 100.00% | 100.00%

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