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Equity (Tables) | 12 Months Ended
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Dec. 31, 2024
Disclosure Of Classes Of Share Capital [Line Items] |
Summary of Common Stocks | 1) Common stocks
|  | December 31 |
|  | 2023 |  |  | 2024 |
|  | NT$ |  |  | NT$ |
|  | (In Millions) |
Number of authorized shares |  |  | 12,000 |  |  |  | 12,000 |
Authorized shares |  | $ | 120,000 |  |  | $ | 120,000 |
Number of issued and paid shares |  |  | 7,757 |  |  |  | 7,757 |
Issued shares |  | $ | 77,574 |  |  | $ | 77,574 |
Adjustments of Additional Paid-in Capital | The adjustments of additional paid-in capital for the years ended December 31, 2022, 2023 and 2024 were as follows:
|  | Share Premium |  |  | Movements of Additional Paid-in Capital for Associates and Joint Ventures Accounted for Using Equity Method |  |  | Movements of Additional Paid-in Capital Arising from Changes in Equities of Subsidiaries |  |  | Difference between Consideration Received or Paid and Carrying Amount of the Subsidiaries’ Net Assets during Actual Disposal or Acquisition |  |  | Donated Capital |  |  | Stockholders’ Contribution Due to Privatization |  |  | Total |
|  | NT$ |  |  | NT$ |  |  | NT$ |  |  | NT$ |  |  | NT$ |  |  | NT$ |  |  | NT$ |
|  | (In Millions) |
Balance on January 1, 2022 |  | $ | 126,045 |  |  | $ | 1 |  |  | $ | 2,106 |  |  | $ | 987 |  |  | $ | 23 |  |  | $ | 20,648 |  |  | $ | 149,810 |
Unclaimed dividend |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 2 |  |  |  | — |  |  |  | 2 |
Changes in equities of subsidiaries |  |  | — |  |  |  | — |  |  |  | 32 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 32 |
Balance on December 31, 2022 |  | $ | 126,045 |  |  | $ | 1 |  |  | $ | 2,138 |  |  | $ | 987 |  |  | $ | 25 |  |  | $ | 20,648 |  |  | $ | 149,844 |
Balance on January 1, 2023 |  | $ | 126,045 |  |  | $ | 1 |  |  | $ | 2,138 |  |  | $ | 987 |  |  | $ | 25 |  |  | $ | 20,648 |  |  | $ | 149,844 |
Unclaimed dividend |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 2 |  |  |  | — |  |  |  | 2 |
Change in additional paid-in capital from investments in associates and joint ventures accounted for using equity method |  |  | — |  |  |  | (26 | ) |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (26 | )
Actual acquisition of interests in subsidiaries |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Changes in equities of subsidiaries |  |  | — |  |  |  | — |  |  |  | 8 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 8 |
Balance on December 31, 2023 |  | $ | 126,045 |  |  | $ | (25 | ) |  | $ | 2,146 |  |  | $ | 987 |  |  | $ | 27 |  |  | $ | 20,648 |  |  | $ | 149,828 |
Balance on January 1, 2024 |  | $ | 126,045 |  |  | $ | (25 | ) |  | $ | 2,146 |  |  | $ | 987 |  |  | $ | 27 |  |  | $ | 20,648 |  |  | $ | 149,828 |
Unclaimed dividend |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 2 |  |  |  | — |  |  |  | 2 |
Actual disposal of interests in subsidiaries |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 224 |  |  |  | — |  |  |  | — |  |  |  | 224 |
Changes in equities of subsidiaries |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | — |
Balance on December 31, 2024 |  | $ | 126,045 |  |  | $ | (25 | ) |  | $ | 2,146 |  |  | $ | 1,211 |  |  | $ | 29 |  |  | $ | 20,648 |  |  | $ | 150,054 |
Appropriations of Earnings | The appropriations of the 2022 and 2023 earnings of Chunghwa approved by the stockholders in their meetings on May 26, 2023 and May 31, 2024, respectively, were as follows:
|  | Appropriation of Earnings |  |  | Dividends Per Share (NT$) |
|  | For Fiscal Year 2022 |  |  | For Fiscal Year 2023 |  |  | For Fiscal Year 2022 |  |  | For Fiscal Year 2023 |
Reversal of special reserve |  | $ | (185 | ) |  | $ | (223 | ) |  |  |  |  |  |
Cash dividends |  |  | 36,476 |  |  |  | 36,910 |  |  | $ | 4.702 |  |  | $ | 4.758 |
The appropriations of earnings for 2024 had been proposed by Chunghwa’s Board of Directors on February 26, 2025. The appropriations and dividends per share were as follows:
|  | Appropriation of Earnings |  |  | Dividends Per Share (NT$) |
Cash dividends |  |  | 38,787 |  |  | $ | 5.000 |
Noncontrolling Interests | e. Noncontrolling interests
|  | Year Ended December 31 |
|  | 2022 |  |  | 2023 |  |  | 2024 |
|  | NT$ |  |  | NT$ |  |  | NT$ |
|  | (In Millions) |
Beginning balance |  | $ | 11,747 |  |  | $ | 12,408 |  |  | $ | 12,432 |
Attributable to noncontrolling interests |  |  |  |  |  |  |  |  |
Net income for the year |  |  | 1,511 |  |  |  | 1,103 |  |  |  | 1,319 |
Exchange differences arising from the translation of the foreign operations |  |  | 21 |  |  |  | 2 |  |  |  | 12 |
Unrealized gain or loss on financial assets at FVOCI |  |  | (25 | ) |  |  | (22 | ) |  |  | 4 |
Remeasurements of defined benefit pension plans |  |  | 24 |  |  |  | 12 |  |  |  | 18 |
Income tax relating to remeasurements of defined benefit pension plans |  |  | (5 | ) |  |  | (2 | ) |  |  | (4 | )
Share of other comprehensive income (loss) of associates and joint ventures accounted for using equity method |  |  | 5 |  |  |  | (21 | ) |  |  | 17 |
Cash dividends distributed by subsidiaries |  |  | (1,053 | ) |  |  | (1,092 | ) |  |  | (898 | )
Actual acquisition or disposal of interests in subsidiaries |  |  | — |  |  |  | — |  |  |  | 35 |
Net increase in noncontrolling interests |  |  | 183 |  |  |  | 44 |  |  |  | 45 |
Ending balance |  | $ | 12,408 |  |  | $ | 12,432 |  |  | $ | 12,980 |
FVOCI [Member] |
Disclosure Of Classes Of Share Capital [Line Items] |
Unrealized Gain or Loss on Financial Assets at FVOCI | 2) Unrealized gain or loss on financial assets at FVOCI
|  | Year Ended December 31 |
|  | 2022 |  |  | 2023 |  |  | 2024 |
|  | NT$ |  |  | NT$ |  |  | NT$ |
|  | (In Millions) |
Beginning balance |  | $ | (8 | ) |  | $ | (125 | ) |  | $ | 521 |
Recognized for the year |  |  |  |  |  |  |  |  |
Unrealized gain or loss |  |  |  |  |  |  |  |  |
Equity instruments |  |  | (111 | ) |  |  | 641 |  |  |  | 45 |
Share of profits (loss) of associates and joint ventures accounted for using equity method |  |  | (6 | ) |  |  | 5 |  |  |  | (2 | )
Transferred accumulated gain or loss to unappropriated earnings resulting from the disposal of equity instruments (Note 9) |  |  | — |  |  |  | — |  |  |  | — |
Ending balance |  | $ | (125 | ) |  | $ | 521 |  |  | $ | 564 |

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