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v3.23.1

Property, Plant and Equipment, Net - Summary of Property, Plant and Equipment, Net (Detail) $ in Thousands, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 TWD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 TWD ($) | Dec. 31, 2020 TWD ($)
Disclosure of detailed information about property, plant and equipment [Line Items] |  |  |  |
Beginning Balance | $ 20,111,121 |  | $ 17,994,686 | $ 17,979,444
Additions | 4,918,482 |  | 6,552,702 | 4,133,615
Disposals | (48,681) |  | (76,375) | (19,358)
Reclassifications | 1,012 |  | 0 | 0
Depreciation expenses | (4,523,081) |  | (4,355,032) | (4,098,993)
Impairment losses | (12,721) | $ (414) | (4,843) |
Exchange adjustments | 73 |  | (17) | (22)
Ending Balance | 20,446,205 | $ 665,350 | 20,111,121 | 17,994,686
Land [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |  |  |
Beginning Balance | 452,738 |  | 452,738 | 452,738
Additions | 0 |  | 0 | 0
Disposals | 0 |  | 0 | 0
Reclassifications | 0 |  | 0 | 0
Depreciation expenses | 0 |  | 0 | 0
Impairment losses | 0 |  | 0 |
Exchange adjustments | 0 |  | 0 | 0
Ending Balance | 452,738 |  | 452,738 | 452,738
Buildings [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |  |  |
Beginning Balance | 4,343,556 |  | 4,092,286 | 4,095,929
Additions | 3,780 |  | 1,345 | 132,572
Disposals | 0 |  | 0 | 0
Reclassifications | 1,503,432 |  | 673,208 | 258,421
Depreciation expenses | (465,260) |  | (423,283) | (394,636)
Impairment losses | 0 |  | 0 |
Exchange adjustments | 0 |  | 0 | 0
Ending Balance | 5,385,508 |  | 4,343,556 | 4,092,286
Machinery and equipment [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |  |  |
Beginning Balance | 13,282,185 |  | 11,348,297 | 11,163,121
Additions | 6,748 |  | 11,829 | 592,565
Disposals | (46,084) |  | (66,873) | (8,940)
Reclassifications | 2,603,381 |  | 4,890,400 | 2,336,238
Depreciation expenses | (3,075,191) |  | (2,896,612) | (2,734,667)
Impairment losses | (12,721) |  | (4,843) |
Exchange adjustments | 50 |  | (13) | (20)
Ending Balance | 12,758,368 |  | 13,282,185 | 11,348,297
Tools [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |  |  |
Beginning Balance | 837,990 |  | 952,361 | 896,476
Additions | 636 |  | 407 | 409,832
Disposals | (2,597) |  | (9,502) | (3,121)
Reclassifications | 685,481 |  | 690,346 | 398,798
Depreciation expenses | (724,813) |  | (795,622) | (749,624)
Impairment losses | 0 |  | 0 |
Exchange adjustments | 0 |  | 0 | 0
Ending Balance | 796,697 |  | 837,990 | 952,361
Other [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |  |  |
Beginning Balance | 511,723 |  | 509,397 | 434,791
Additions | 0 |  | 189 | 142,776
Disposals | 0 |  | 0 | (7,297)
Reclassifications | 294,765 |  | 241,656 | 159,195
Depreciation expenses | (257,817) |  | (239,515) | (220,066)
Impairment losses | 0 |  | 0 |
Exchange adjustments | 23 |  | (4) | (2)
Ending Balance | 548,694 |  | 511,723 | 509,397
Construction in progress and equipment to be inspected [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |  |  |
Beginning Balance | 682,929 |  | 639,607 | 936,389
Additions | 4,907,318 |  | 6,538,932 | 2,855,870
Disposals | 0 |  | 0 | 0
Reclassifications | (5,086,047) |  | (6,495,610) | (3,152,652)
Depreciation expenses | 0 |  | 0 | 0
Impairment losses | 0 |  | 0 |
Exchange adjustments | 0 |  | 0 | 0
Ending Balance | 504,200 |  | 682,929 | 639,607
Gross carrying amount [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |  |  |
Beginning Balance | 78,108,945 |  | 73,187,794 | 70,401,687
Ending Balance | 81,866,361 |  | 78,108,945 | 73,187,794
Gross carrying amount [member] | Land [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |  |  |
Beginning Balance | 452,738 |  | 452,738 | 452,738
Ending Balance | 452,738 |  | 452,738 | 452,738
Gross carrying amount [member] | Buildings [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |  |  |
Beginning Balance | 11,877,419 |  | 11,212,129 | 10,821,972
Ending Balance | 13,379,852 |  | 11,877,419 | 11,212,129
Gross carrying amount [member] | Machinery and equipment [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |  |  |
Beginning Balance | 57,176,339 |  | 53,246,474 | 51,244,512
Ending Balance | 59,197,255 |  | 57,176,339 | 53,246,474
Gross carrying amount [member] | Tools [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |  |  |
Beginning Balance | 5,574,316 |  | 5,451,547 | 5,008,321
Ending Balance | 5,716,357 |  | 5,574,316 | 5,451,547
Gross carrying amount [member] | Other [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |  |  |
Beginning Balance | 2,345,204 |  | 2,185,299 | 1,937,755
Ending Balance | 2,615,959 |  | 2,345,204 | 2,185,299
Gross carrying amount [member] | Construction in progress and equipment to be inspected [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |  |  |
Beginning Balance | 682,929 |  | 639,607 | 936,389
Ending Balance | 504,200 |  | 682,929 | 639,607
Accumulated depreciation and impairment [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |  |  |
Beginning Balance | (57,997,824) |  | (55,193,108) | (52,422,243)
Ending Balance | (61,420,156) |  | (57,997,824) | (55,193,108)
Accumulated depreciation and impairment [member] | Land [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |  |  |
Beginning Balance | (0) |  | (0) | (0)
Ending Balance | (0) |  | (0) | (0)
Accumulated depreciation and impairment [member] | Buildings [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |  |  |
Beginning Balance | (7,533,863) |  | (7,119,843) | (6,726,043)
Ending Balance | (7,994,344) |  | (7,533,863) | (7,119,843)
Accumulated depreciation and impairment [member] | Machinery and equipment [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |  |  |
Beginning Balance | (43,894,154) |  | (41,898,177) | (40,081,391)
Ending Balance | (46,438,887) |  | (43,894,154) | (41,898,177)
Accumulated depreciation and impairment [member] | Tools [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |  |  |
Beginning Balance | (4,736,326) |  | (4,499,186) | (4,111,845)
Ending Balance | (4,919,660) |  | (4,736,326) | (4,499,186)
Accumulated depreciation and impairment [member] | Other [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |  |  |
Beginning Balance | (1,833,481) |  | (1,675,902) | (1,502,964)
Ending Balance | (2,067,265) |  | (1,833,481) | (1,675,902)
Accumulated depreciation and impairment [member] | Construction in progress and equipment to be inspected [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [Line Items] |  |  |  |
Beginning Balance | (0) |  | (0) | (0)
Ending Balance | $ (0) |  | $ (0) | $ (0)

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