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Consolidated Statements of Changes in Equity shares in Millions, $ in Millions, $ in Millions | TWD ($) | USD ($) | Capital Stock - Common Stock [member] TWD ($) shares | Capital Stock - Common Stock [member] USD ($) shares | Capital Surplus [member] TWD ($) | Capital Surplus [member] USD ($) | Retained Earnings - Legal Capital Reserve [member] TWD ($) | Retained Earnings - Legal Capital Reserve [member] USD ($) | Retained Earnings - Special Capital Reserve [member] TWD ($) | Retained Earnings - Special Capital Reserve [member] USD ($) | Retained Earnings - Unappropriated Earnings [member] TWD ($) | Retained Earnings - Unappropriated Earnings [member] USD ($) | Retained Earnings [member] TWD ($) | Retained Earnings [member] USD ($) | Others - Foreign Currency Translation Reserve [member] TWD ($) | Others - Foreign Currency Translation Reserve [member] USD ($) | Other - Unrealized Gain (Loss) on Financial Assets at Fair Value Through Other Comprehensive Income [member] TWD ($) | Other - Unrealized Gain (Loss) on Financial Assets at Fair Value Through Other Comprehensive Income [member] USD ($) | Other - Gain (Loss) on Hedging Instruments [member] TWD ($) | Other - Gain (Loss) on Hedging Instruments [member] USD ($) | Others - Unearned Stock-Based Employee Compensation [member] TWD ($) | Others - Unearned Stock-Based Employee Compensation [member] USD ($) | Others - Total [member] TWD ($) | Others - Total [member] USD ($) | Treasury shares [member] TWD ($) | Total Equity Attributable to Shareholders of the Parent [member] TWD ($) | Total Equity Attributable to Shareholders of the Parent [member] USD ($) | Non-controlling Interests [member] TWD ($) | Non-controlling Interests [member] USD ($)
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Beginning balance at Dec. 31, 2019 | $ 1,614,387.3 |  | $ 259,303.8 |  | $ 56,339.7 |  | $ 311,147.0 |  | $ 10,675.1 |  | $ 1,003,808.3 |  | $ 1,325,630.4 |  | $ (26,871.4) |  | $ (692.9) |  | $ (3.8) |  | $ (0.2) |  | $ (27,568.3) |  |  | $ 1,613,705.6 |  | $ 681.7 |
Beginning balance, shares at Dec. 31, 2019 | shares |  |  | 25,930.3 | 25,930.3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Special capital reserve |  |  |  |  |  |  |  |  | 31,584.0 |  | (31,584.0) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends to shareholders | (259,303.8) |  |  |  |  |  |  |  |  |  | (259,303.8) |  | (259,303.8) |  |  |  |  |  |  |  |  |  |  |  |  | (259,303.8) |  |  |
Total | (259,303.8) |  |  |  |  |  |  |  | 31,584.0 |  | (290,887.8) |  | (259,303.8) |  |  |  |  |  |  |  |  |  |  |  |  | (259,303.8) |  |  |
Net income | 511,008.0 |  |  |  |  |  |  |  |  |  | 510,744.0 |  | 510,744.0 |  |  |  |  |  |  |  |  |  |  |  |  | 510,744.0 |  | 264.0 |
Other comprehensive income (loss), net of income tax | (30,321.8) |  |  |  |  |  |  |  |  |  | (3,121.8) |  | (3,121.8) |  | (30,130.2) |  | 2,906.0 |  | 24.1 |  |  |  | (27,200.1) |  |  | (30,321.9) |  | 0.1 |
Total comprehensive income (loss) | 480,686.2 |  |  |  |  |  |  |  |  |  | 507,622.2 |  | 507,622.2 |  | (30,130.2) |  | 2,906.0 |  | 24.1 |  |  |  | (27,200.1) |  |  | 480,422.1 |  | 264.1 |
Disposal of investments in equity instruments at fair value through other comprehensive income |  |  |  |  |  |  |  |  |  |  | (108.7) |  | (108.7) |  |  |  | 108.7 |  |  |  |  |  | 108.7 |  |  |  |  |  |
Basis adjustment for gain on hedging instruments | (20.3) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (20.3) |  |  |  | (20.3) |  |  | (20.3) |  |  |
Adjustments to share of changes in equities of associates | 0.5 |  |  |  | 0.3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.2 |  | 0.2 |  |  | 0.5 |  |  |
Donation from shareholders | 7.2 |  |  |  | 7.2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 7.2 |  |  |
Decrease in non-controlling interests | 6.7 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6.7 |
Ending balance at Dec. 31, 2020 | 1,835,763.8 |  | $ 259,303.8 |  | 56,347.2 |  | 311,147.0 |  | 42,259.1 |  | 1,220,434.0 |  | 1,573,840.1 |  | (57,001.6) |  | 2,321.8 |  |  |  |  |  | (54,679.8) |  |  | 1,834,811.3 |  | 952.5 |
Ending balance, shares at Dec. 31, 2020 | shares |  |  | 25,930.3 | 25,930.3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Special capital reserve |  |  |  |  |  |  |  |  | 17,045.1 |  | (17,045.1) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends to shareholders | (278,751.6) |  |  |  |  |  |  |  |  |  | (278,751.6) |  | (278,751.6) |  |  |  |  |  |  |  |  |  |  |  |  | (278,751.6) |  |  |
Total | (278,751.6) |  |  |  |  |  |  |  | 17,045.1 |  | (295,796.7) |  | (278,751.6) |  |  |  |  |  |  |  |  |  |  |  |  | (278,751.6) |  |  |
Net income | 592,880.6 |  |  |  |  |  |  |  |  |  | 592,359.2 |  | 592,359.2 |  |  |  |  |  |  |  |  |  |  |  |  | 592,359.2 |  | 521.4 |
Other comprehensive income (loss), net of income tax | (7,619.4) |  |  |  |  |  |  |  |  |  | 167.5 |  | 167.5 |  | (6,301.7) |  | (1,559.8) |  | 72.1 |  |  |  | (7,789.4) |  |  | (7,621.9) |  | 2.5 |
Total comprehensive income (loss) | 585,261.2 |  |  |  |  |  |  |  |  |  | 592,526.7 |  | 592,526.7 |  | (6,301.7) |  | (1,559.8) |  | 72.1 |  |  |  | (7,789.4) |  |  | 584,737.3 |  | 523.9 |
Disposal of investments in equity instruments at fair value through other comprehensive income |  |  |  |  |  |  |  |  |  |  | 187.7 |  | 187.7 |  |  |  | (187.7) |  |  |  |  |  | (187.7) |  |  |  |  |  |
Basis adjustment for gain on hedging instruments | 48.5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 48.5 |  |  |  | 48.5 |  |  | 48.5 |  |  |
Adjustments to share of changes in equities of associates | 4.8 |  |  |  | 4.8 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4.8 |  |  |
From difference between the consideration received and the carrying amount of the subsidiaries' net assets during actual disposal | 9,451.8 |  |  |  | 8,406.3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 8,406.3 |  | 1,045.5 |
From share of changes in equities of subsidiaries |  |  |  |  | (7.9) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (7.9) |  | 7.9 |
Donation from shareholders | 11.2 |  |  |  | 11.1 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 11.1 |  | 0.1 |
Decrease in non-controlling interests | (107.4) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (107.4) |
Effect of acquisition of subsidiary | 0.2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 0.2 |
Ending balance at Dec. 31, 2021 | 2,151,682.5 |  | $ 259,303.8 |  | 64,761.5 |  | 311,147.0 |  | 59,304.2 |  | 1,517,351.7 |  | 1,887,802.9 |  | (63,303.3) |  | 574.3 |  | 120.6 |  |  |  | (62,608.4) |  |  | 2,149,259.8 |  | 2,422.7 |
Ending balance, shares at Dec. 31, 2021 | shares |  |  | 25,930.3 | 25,930.3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Special capital reserve |  |  |  |  |  |  |  |  | (56,149.9) |  | 56,149.9 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash dividends to shareholders | (285,234.2) |  |  |  |  |  |  |  |  |  | (285,234.2) |  | (285,234.2) |  |  |  |  |  |  |  |  |  |  |  |  | (285,234.2) |  |  |
Total | (285,234.2) |  |  |  |  |  |  |  | (56,149.9) |  | (229,084.3) |  | (285,234.2) |  |  |  |  |  |  |  |  |  |  |  |  | (285,234.2) |  |  |
Net income | 993,294.7 | $ 32,323.3 |  |  |  |  |  |  |  |  | 992,923.4 |  | 992,923.4 |  |  |  |  |  |  |  |  |  |  |  |  | 992,923.4 |  | 371.3 |
Other comprehensive income (loss), net of income tax | 42,430.1 | 1,380.7 |  |  |  |  |  |  |  |  | (49.5) |  | (49.5) |  | 51,560.0 |  | (10,327.4) |  | 1,411.6 |  |  |  | 42,644.2 |  |  | 42,594.7 |  | (164.6) |
Total comprehensive income (loss) | 1,035,724.8 | 33,704.0 |  |  |  |  |  |  |  |  | 992,873.9 |  | 992,873.9 |  | 51,560.0 |  | (10,327.4) |  | 1,411.6 |  |  |  | 42,644.2 |  |  | 1,035,518.1 |  | 206.7 |
Share-based payment arrangements | 266.7 |  | $ 13.9 |  | 438.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (185.2) |  | (185.2) |  |  | 266.7 |  |  |
Share-based payment arrangements, shares | shares |  |  | 1.4 | 1.4 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Treasury stock acquired | (871.6) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ (871.6) | (871.6) |  |  |
Treasury stock retired |  |  | $ (13.9) |  | (3.0) |  |  |  |  |  | (854.7) |  | (854.7) |  |  |  |  |  |  |  |  |  |  |  | $ 871.6 |  |  |  |
Treasury stock retired, shares | shares |  |  | (1.4) | (1.4) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Disposal of investments in equity instruments at fair value through other comprehensive income |  |  |  |  |  |  |  |  |  |  | 303.3 |  | 303.3 |  |  |  | (303.3) |  |  |  |  |  | (303.3) |  |  |  |  |  |
Basis adjustment for gain on hedging instruments | (52.9) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (52.9) |  |  |  | (52.9) |  |  | (52.9) |  |  |
Adjustments to share of changes in equities of associates | 4.6 |  |  |  | 4.6 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4.6 |  |  |
From share of changes in equities of subsidiaries | 16,466.3 |  |  |  | 4,116.0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4,116.0 |  | 12,350.3 |
Donation from shareholders | 13.2 |  |  |  | 13.2 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 13.2 |  |  |
Decrease in non-controlling interests | (167.0) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (167.0) |
Ending balance at Dec. 31, 2022 | $ 2,917,832.4 | $ 94,950.6 | $ 259,303.8 | $ 8,438.1 | $ 69,330.3 | $ 2,256.1 | $ 311,147.0 | $ 10,125.2 | $ 3,154.3 | $ 102.6 | $ 2,280,589.9 | $ 74,213.8 | $ 2,594,891.2 | $ 84,441.6 | $ (11,743.3) | $ (382.1) | $ (10,056.4) | $ (327.2) | $ 1,479.3 | $ 48.1 | $ (185.2) | $ (6.0) | $ (20,505.6) | $ (667.2) |  | $ 2,903,019.7 | $ 94,468.6 | $ 14,812.7 | $ 482.0
Ending balance, shares at Dec. 31, 2022 | shares |  |  | 25,930.3 | 25,930.3 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |

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- Definition The amount of income and expense (including reclassification adjustments) that is not recognised in profit or loss as required or permitted by IFRSs. [Refer: IFRSs [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2022-03-24 -Paragraph B12 -Subparagraph b -Clause viii -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=12&code=ifrs-tx-2022-en-r&anchor=para_B12_b_viii&doctype=Appendix&subtype=B -URIDate 2022-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 81A -Subparagraph b -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_81A_b&doctype=Standard -URIDate 2022-03-24 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 91 -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_91_a&doctype=Standard -URIDate 2022-03-24 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2022-03-24 -Paragraph 106 -Subparagraph d -Clause ii -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2022-en-r&anchor=para_106_d_ii&doctype=Standard -URIDate 2022-03-24 + Details
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