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v3.23.1

Profit Before Income Tax - Summary of Depreciation and Amortization (Detail) $ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2022 TWD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 TWD ($) | Dec. 31, 2020 TWD ($)
Analysis of income and expense [Line Items] |  |  |  |
Property, plant and equipment | $ 48,945,756 | $ 1,592,768 | $ 48,604,160 | $ 46,016,548
Right-of-use assets | 1,468,040 | 47,772 | 1,114,950 | 946,880
Investment properties | 1,107,014 | 36,024 | 751,047 | 562,260
Intangible assets amortization | 3,931,079 | 127,923 | 4,054,120 | 3,733,377
Depreciation and amortization | 55,451,889 | 1,804,487 | 54,524,277 | 51,259,065
Depreciation expense | 51,520,810 | 1,676,564 | 50,470,157 | 47,525,688
Operating costs [member] |  |  |  |
Analysis of income and expense [Line Items] |  |  |  |
Intangible assets amortization | 2,465,837 | 80,242 | 2,443,870 | 2,231,060
Depreciation expense | 47,894,701 | 1,558,565 | 46,880,267 | 44,017,839
Operating expenses [member] |  |  |  |
Analysis of income and expense [Line Items] |  |  |  |
Intangible assets amortization | 1,465,242 | 47,681 | 1,610,250 | 1,502,317
Depreciation expense | $ 3,626,109 | $ 117,999 | $ 3,589,890 | $ 3,507,849

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