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Subsidiaries - Summarized Financial Information Before Intercompany Eliminations (Detail) $ in Millions, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 TWD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 TWD ($) | Dec. 31, 2021 TWD ($) | Dec. 31, 2023 USD ($)
Disclosure of subsidiaries [Line Items] |  |  |  |  |
Current assets | $ 103,204 |  | $ 101,901 |  | $ 3,371
Noncurrent assets | 420,537 |  | 421,095 |  | 13,734
Current liabilities | 67,750 |  | 67,740 |  | 2,213
Noncurrent liabilities | 63,272 |  | 63,727 |  | 2,066
Equity attributable to the parent | 380,287 |  | 379,121 |  | 12,420
NONCONTROLLING INTERESTS | 12,432 |  | 12,408 |  | $ 406
NET INCOME | 38,061 | $ 1,243 | 37,869 | $ 37,047 |
Profit attributable to the parent | 36,958 | 1,207 | 36,358 | 35,616 |
Profit attributable to noncontrolling interests | 1,103 | 36 | 1,511 | 1,431 |
Other comprehensive income (loss) | 669 | 22 | 1,112 | (966) |
Total comprehensive income attributable to the parent | 37,658 | 1,230 | 37,450 | 34,652 |
Total comprehensive income, attributable to non-controlling interests | 1,072 | 35 | 1,531 | 1,429 |
TOTAL COMPREHENSIVE INCOME | 38,730 | 1,265 | 38,981 | 36,081 |
Net cash flow from operating activities | 74,559 | 2,436 | 75,951 | 74,858 |
Net cash flow from investing activities | (50,174) | (1,639) | (30,789) | (31,172) |
Net cash flow from financing activities | (40,730) | (1,330) | (34,800) | (34,314) |
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS | (24) | (1) | 52 | (13) |
Net cash inflow (outflow) | (16,369) | $ (534) | 10,414 | 9,359 |
Senao International Co., Ltd. (SENAO) [Member] |  |  |  |  |
Disclosure of subsidiaries [Line Items] |  |  |  |  |
Current assets | 6,540 |  | 7,249 |  |
Noncurrent assets | 3,141 |  | 3,053 |  |
Current liabilities | 2,982 |  | 3,714 |  |
Noncurrent liabilities | 459 |  | 460 |  |
Equity attributable to the parent | 1,707 |  | 1,674 |  |
NONCONTROLLING INTERESTS | 4,533 |  | 4,454 |  |
Revenues and income | 31,675 |  | 31,602 | 31,302 |
Costs and expenses | 30,964 |  | 30,958 | 30,715 |
NET INCOME | 711 |  | 644 | 587 |
Profit attributable to the parent | 201 |  | 182 | 166 |
Profit attributable to noncontrolling interests | 510 |  | 462 | 421 |
Other comprehensive income (loss) attributable to the parent | (9) |  | 11 | 2 |
Other comprehensive income (loss) attributable to noncontrolling interests | (23) |  | 26 | 5 |
Other comprehensive income (loss) | (32) |  | 37 | 7 |
Total comprehensive income attributable to the parent | 192 |  | 192 | 168 |
Total comprehensive income, attributable to non-controlling interests | 487 |  | 488 | 426 |
TOTAL COMPREHENSIVE INCOME | 679 |  | 680 | 594 |
Net cash flow from operating activities | 1,146 |  | (329) | 654 |
Net cash flow from investing activities | 36 |  | 36 | 215 |
Net cash flow from financing activities | (873) |  | (826) | (690) |
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS | 0 |  | 1 | 0 |
Net cash inflow (outflow) | 309 |  | (1,118) | 179 |
Dividends paid to noncontrolling interests | 408 |  | 371 | 278 |
Chunghwa Precision Test Tech. Co., Ltd. (CHPT) [Member] |  |  |  |  |
Disclosure of subsidiaries [Line Items] |  |  |  |  |
Current assets | 3,773 |  | 4,406 |  |
Noncurrent assets | 4,499 |  | 4,631 |  |
Current liabilities | 677 |  | 1,087 |  |
Noncurrent liabilities | 23 |  | 26 |  |
Equity attributable to the parent | 2,578 |  | 2,689 |  |
NONCONTROLLING INTERESTS | 4,994 |  | 5,235 |  |
Revenues and income | 2,941 |  | 4,434 | 4,254 |
Costs and expenses | 2,905 |  | 3,673 | 3,360 |
NET INCOME | 36 |  | 761 | 894 |
Profit attributable to the parent | 21 |  | 265 | 306 |
Profit attributable to noncontrolling interests | 15 |  | 496 | 588 |
Other comprehensive income (loss) attributable to the parent | (1) |  | 5 | (1) |
Other comprehensive income (loss) attributable to noncontrolling interests | (2) |  | 7 | (2) |
Other comprehensive income (loss) | (3) |  | 12 | (3) |
Total comprehensive income attributable to the parent | 20 |  | 270 | 305 |
Total comprehensive income, attributable to non-controlling interests | 13 |  | 503 | 586 |
TOTAL COMPREHENSIVE INCOME | 33 |  | 773 | 891 |
Net cash flow from operating activities | 325 |  | 1,401 | 1,090 |
Net cash flow from investing activities | (244) |  | (1,011) | (519) |
Net cash flow from financing activities | (409) |  | (388) | (414) |
EFFECT OF EXCHANGE RATE CHANGES ON CASH AND CASH EQUIVALENTS | (2) |  | 8 | (1) |
Net cash inflow (outflow) | 330 |  | 10 | 156 |
Dividends paid to noncontrolling interests | $ 253 |  | $ 293 | $ 259 |

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