Profit Before Income Tax - Summary of Depreciation and Amortization (Detail) $ in Thousands, $ in Thousands |
12 Months Ended | |||
|---|---|---|---|---|
|
Dec. 31, 2023
TWD ($)
|
Dec. 31, 2023
USD ($)
|
Dec. 31, 2022
TWD ($)
|
Dec. 31, 2021
TWD ($)
|
|
| Analysis of income and expense [Line Items] | ||||
| Property, plant and equipment | $ 51,799,481 | $ 1,691,688 | $ 48,945,756 | $ 48,604,160 |
| Right-of-use assets | 1,304,020 | 42,587 | 1,468,040 | 1,114,950 |
| Investment properties | 1,091,879 | 35,659 | 1,107,014 | 751,047 |
| Intangible assets amortization | 3,906,483 | 127,579 | 3,931,079 | 4,054,120 |
| Depreciation and amortization | 58,101,863 | 1,897,513 | 55,451,889 | 54,524,277 |
| Depreciation expense | 54,195,380 | 1,769,934 | 51,520,810 | 50,470,157 |
| Operating costs [member] | ||||
| Analysis of income and expense [Line Items] | ||||
| Intangible assets amortization | 2,433,492 | 79,474 | 2,465,837 | 2,443,870 |
| Depreciation expense | 49,701,740 | 1,623,179 | 47,894,701 | 46,880,267 |
| Operating expenses [member] | ||||
| Analysis of income and expense [Line Items] | ||||
| Intangible assets amortization | 1,472,991 | 48,105 | 1,465,242 | 1,610,250 |
| Depreciation expense | $ 4,493,640 | $ 146,755 | $ 3,626,109 | $ 3,589,890 |