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Financial Risk and Fair Value Disclosures - Maturity Profile of Financial Liabilities Based on Contractual Undiscounted Payments and Contractual Maturity (Detail) - TWD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
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Disclosure Of Maturity Analysis For Non-derivative And Derivative Financial Liabilities [Line Items] |  |
Short-term loans | $ 13,780,612 |
Payables | 52,202,821 | $ 58,767,584
Guarantee deposits | 41,599,386 | 30,757,001
Bonds payable | 40,232,586 | 23,809,420
Long-term loans | 25,290,536 | 22,501,470
Lease liabilities | 6,897,571 | 7,388,213
Other financial liabilities |  | 21,541,642
Total | 180,003,512 | 164,765,330
Not later than one year [member] |  |
Disclosure Of Maturity Analysis For Non-derivative And Derivative Financial Liabilities [Line Items] |  |
Short-term loans | 13,780,612 |
Payables | 52,202,821 | 58,767,584
Guarantee deposits | 1,476,430 | 238,416
Bonds payable | 14,797,772 | 322,155
Long-term loans | 2,872,168 | 3,246,153
Lease liabilities | 649,879 | 658,092
Other financial liabilities |  | 17,233,129
Total | 85,779,682 | 80,465,529
Later than two years and not later than three years [member] |  |
Disclosure Of Maturity Analysis For Non-derivative And Derivative Financial Liabilities [Line Items] |  |
Short-term loans | 0 |
Payables | 0 | 0
Guarantee deposits | 3,556,179 | 3,867,087
Bonds payable | 10,980,506 | 8,742,481
Long-term loans | 14,406,101 | 8,425,744
Lease liabilities | 1,311,239 | 1,222,822
Other financial liabilities |  | 4,308,513
Total | 30,254,025 | 26,566,647
Later than four years and not later than five years [member] |  |
Disclosure Of Maturity Analysis For Non-derivative And Derivative Financial Liabilities [Line Items] |  |
Short-term loans | 0 |
Payables | 0 | 0
Guarantee deposits | 25,955,654 | 169,419
Bonds payable | 12,321,345 | 10,593,656
Long-term loans | 5,071,743 | 7,798,280
Lease liabilities | 1,223,724 | 1,207,385
Other financial liabilities |  | 0
Total | 44,572,466 | 19,768,740
Later than five years [member] |  |
Disclosure Of Maturity Analysis For Non-derivative And Derivative Financial Liabilities [Line Items] |  |
Short-term loans | 0 |
Payables | 0 | 0
Guarantee deposits | 10,611,123 | 26,482,079
Bonds payable | 2,132,963 | 4,151,128
Long-term loans | 2,940,524 | 3,031,293
Lease liabilities | 3,712,729 | 4,299,914
Other financial liabilities |  | 0
Total | $ 19,397,339 | $ 37,964,414

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