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Cash Flows Information - Change in Liabilities Arising From Financing Activities (Detail) $ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2021 USD ($) | Dec. 31, 2021 TWD ($) | Dec. 31, 2020 TWD ($) | Dec. 31, 2019 TWD ($)
Disclosure of non-cash investing activities [line items] |  |  |  |
Beginning balance | $ 7,538,500 | $ 209,117,966 | $ 223,982,006 | $ 208,132,097
Net financing cash flows | 772,739 | 21,435,763 | (9,129,670) | 15,104,066
Interest under operating activities | 29 | 800 | 111 | 1,766
Rent expense under operating activities | (7) | (184) | (7,729) |
Convertible bonds classified separately as equity components and embedded derivative liability | (14,418) | (399,955) |  |
Non-cash changes |  |  |  |
Lease liabilities | 73,456 | 2,037,665 | 584,642 | 536,216
Amortization of issuance cost | 12,663 | 351,262 | 171,232 | 200,673
Convertible bonds issued by subsidiaries and converted to ordinary shares | (4) | (102) |  |
Lease modifications | (2,120) | (58,799) | (289,687) | (239,321)
Adjustments for government subsidy |  |  | 41,650 |
Acquisition of subsidiaries (Note 29) | 6,516 | 180,745 | 990,023 | 2,508,101
Disposal of subsidiaries (Note 30) | (89,245) | (2,475,660) | (4,694,352) |
Reclassification | 13,709 | 380,292 |  |
Effects of foreign currency exchange | (122,338) | (3,393,653) | (2,530,260) | (2,261,592)
Ending balance | 8,189,480 | 227,176,140 | 209,117,966 | 223,982,006
Short-term borrowings [member] |  |  |  |
Disclosure of non-cash investing activities [line items] |  |  |  |
Beginning balance | 1,247,219 | 34,597,858 | 40,572,329 | 47,163,103
Net financing cash flows | 362,055 | 10,043,398 | (1,502,323) | (4,683,142)
Non-cash changes |  |  |  |
Short-term borrowings transferred to long-term borrowings |  |  | (3,850,000) | (1,499,000)
Acquisition of subsidiaries (Note 29) |  |  | 356,417 | 656,820
Disposal of subsidiaries (Note 30) | (88,068) | (2,443,005) |  |
Effects of foreign currency exchange | (41,883) | (1,161,822) | (978,565) | (1,065,452)
Ending balance | 1,479,323 | 41,036,429 | 34,597,858 | 40,572,329
Bonds payable [member] |  |  |  |
Disclosure of non-cash investing activities [line items] |  |  |  |
Beginning balance | 2,027,886 | 56,253,554 | 36,522,155 | 16,985,936
Net financing cash flows | (134,068) | (3,719,057) | 19,717,149 | 19,279,033
Convertible bonds classified separately as equity components and embedded derivative liability | (14,418) | (399,955) |  |
Non-cash changes |  |  |  |
Amortization of issuance cost | 4,553 | 126,283 | 14,250 | 11,522
Convertible bonds issued by subsidiaries and converted to ordinary shares | (4) | (102) |  |
Acquisition of subsidiaries (Note 29) |  |  |  | 245,664
Effects of foreign currency exchange | 238 | 6,614 |  |
Ending balance | 1,884,187 | 52,267,337 | 56,253,554 | 36,522,155
Long-term borrowings [member] |  |  |  |
Disclosure of non-cash investing activities [line items] |  |  |  |
Beginning balance | 4,051,577 | 112,390,724 | 141,078,598 | 137,898,329
Net financing cash flows | 577,463 | 16,018,825 | (26,500,139) | 1,144,731
Non-cash changes |  |  |  |
Amortization of issuance cost | 8,110 | 224,979 | 156,982 | 189,151
Short-term borrowings transferred to long-term borrowings |  |  | 3,850,000 | 1,499,000
Adjustments for government subsidy |  |  | 41,650 |
Acquisition of subsidiaries (Note 29) |  |  |  | 1,523,968
Disposal of subsidiaries (Note 30) |  |  | (4,693,682) |
Effects of foreign currency exchange | (77,939) | (2,162,038) | (1,542,685) | (1,176,581)
Ending balance | 4,559,211 | 126,472,490 | 112,390,724 | 141,078,598
Lease liabilities [member] |  |  |  |
Disclosure of non-cash investing activities [line items] |  |  |  |
Beginning balance | 211,818 | 5,875,830 | 5,808,924 | 6,084,729
Net financing cash flows | (32,711) | (907,403) | (844,357) | (636,556)
Interest under operating activities | 29 | 800 | 111 | 1,766
Rent expense under operating activities | (7) | (184) | (7,729) |
Non-cash changes |  |  |  |
Lease liabilities | 73,456 | 2,037,665 | 584,642 | 536,216
Lease modifications | (2,120) | (58,799) | (289,687) | (239,321)
Acquisition of subsidiaries (Note 29) | 6,516 | 180,745 | 633,606 | 81,649
Disposal of subsidiaries (Note 30) | (1,177) | (32,655) | (670) |
Reclassification | 13,709 | 380,292 |  |
Effects of foreign currency exchange | (2,754) | (76,407) | (9,010) | (19,559)
Ending balance | $ 266,759 | $ 7,399,884 | $ 5,875,830 | $ 5,808,924

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