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Cash Flow Information - Change in Liabilities Arising From Financing Activities (Detail) $ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2024 TWD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 TWD ($) | Dec. 31, 2022 TWD ($)
Disclosure of non-cash investing activities [line items] |  |  |  |
Beginning balance | $ 191,733,723 | $ 5,847,323 | $ 202,279,392 | $ 227,176,140
Net financing cash flows | 14,939,523 | 455,612 | (11,954,082) | (32,224,610)
Interest under operating activities | 13,538 | 413 | 22 | 1,394
Rent expense under operating activities |  |  |  | (1,904)
Convertible bonds classified separately as equity components and embedded derivative liability | (100,872) | (3,076) | (412,264) | (1,092,004)
Non-cash changes |  |  |  |
Additions to lease liabilities | 1,342,690 | 40,948 | 1,644,665 | 1,379,342
Amortization of discount | 443,314 | 13,519 | 411,116 | 297,446
Convertible bonds issued by subsidiaries and converted to subsidiaries' ordinary shares | (99) | (3) | (228) | (171)
Lease modifications | (409,679) | (12,494) | (113,514) | (117,549)
Adjustments for government subsidy | (748) | (23) | (1,002) | (46,672)
Acquisition through business combinations (Note 29) | 96,894 | 2,955 | 143,629 |
Reclassification |  |  | (8,226) |
Effects of foreign currency exchange | 5,809,863 | 177,185 | (255,785) | 6,907,980
Ending balance | 213,868,147 | 6,522,359 | 191,733,723 | 202,279,392
Income tax paid |  |  |  |
Operating activities | 9,072,635 | 276,689 | 15,474,646 | 14,250,527
Investing activities | 1,170,149 | 35,686 | 0 | 842,440
Total taxes paid | 10,242,784 | 312,375 | 15,474,646 | 15,092,967
Short-term borrowings [member] |  |  |  |
Disclosure of non-cash investing activities [line items] |  |  |  |
Beginning balance | 50,254,188 | 1,532,607 | 46,731,130 | 41,036,429
Net financing cash flows | (4,514,729) | (137,686) | 3,231,840 | 1,866,253
Non-cash changes |  |  |  |
Long-term borrowings transferred to short-term borrowings |  |  |  | 1,522,294
Effects of foreign currency exchange | 1,705,403 | 52,010 | 291,218 | 2,306,154
Ending balance | 47,444,862 | 1,446,931 | 50,254,188 | 46,731,130
Short-term Bills Payable [member] |  |  |  |
Disclosure of non-cash investing activities [line items] |  |  |  |
Beginning balance | 2,787,340 | 85,006 |  |
Net financing cash flows | (2,787,340) | (85,006) | 2,787,340 |
Non-cash changes |  |  |  |
Ending balance | 0 | 0 | 2,787,340 |
Bonds Payable [member] |  |  |  |
Disclosure of non-cash investing activities [line items] |  |  |  |
Beginning balance | 45,009,486 | 1,372,659 | 47,850,324 | 52,267,337
Net financing cash flows | (12,867,386) | (392,418) | (2,573,366) | (3,539,423)
Convertible bonds classified separately as equity components and embedded derivative liability | (100,872) | (3,076) | (412,264) | (1,092,004)
Non-cash changes |  |  |  |
Amortization of discount | 366,988 | 11,192 | 319,578 | 182,759
Convertible bonds issued by subsidiaries and converted to subsidiaries' ordinary shares | (99) | (3) | (228) | (171)
Effects of foreign currency exchange | 568,047 | 17,324 | (174,558) | 31,826
Ending balance | 32,976,164 | 1,005,678 | 45,009,486 | 47,850,324
Long-term borrowings [member] |  |  |  |
Disclosure of non-cash investing activities [line items] |  |  |  |
Beginning balance | 85,460,703 | 2,606,304 | 99,989,451 | 126,472,490
Net financing cash flows | 36,656,269 | 1,117,910 | (14,263,230) | (29,516,421)
Non-cash changes |  |  |  |
Amortization of discount | 76,326 | 2,327 | 91,538 | 114,687
Adjustments for government subsidy | (748) | (23) | (1,002) | (46,672)
Long-term borrowings transferred to short-term borrowings |  |  |  | (1,522,294)
Effects of foreign currency exchange | 3,442,548 | 104,988 | (356,054) | 4,487,661
Ending balance | 125,635,098 | 3,831,506 | 85,460,703 | 99,989,451
Lease liabilities [member] |  |  |  |
Disclosure of non-cash investing activities [line items] |  |  |  |
Beginning balance | 8,222,006 | 250,747 | 7,708,487 | 7,399,884
Net financing cash flows | (1,547,291) | (47,188) | (1,136,666) | (1,035,019)
Interest under operating activities | 13,538 | 413 | 22 | 1,394
Rent expense under operating activities |  |  |  | (1,904)
Non-cash changes |  |  |  |
Additions to lease liabilities | 1,342,690 | 40,948 | 1,644,665 | 1,379,342
Lease modifications | (409,679) | (12,494) | (113,514) | (117,549)
Acquisition through business combinations (Note 29) | 96,894 | 2,955 | 143,629 |
Reclassification |  |  | (8,226) |
Effects of foreign currency exchange | 93,865 | 2,863 | (16,391) | 82,339
Ending balance | $ 7,812,023 | $ 238,244 | $ 8,222,006 | $ 7,708,487

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