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 ($)
|
Retained Earnings - Unappropriated Earnings [member]
TWD ($)
|
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 ($)
|
Non-controlling Interests [member]
USD ($)
|
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Beginning 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 | ||||||||||||||||
| Beginning 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 (loss) 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 | ||||||||||||||||||||||||
| Effect of acquisition of subsidiary | 0.2 | 0.2 | ||||||||||||||||||||||||||
| Decrease in non-controlling interests | (107.4) | (107.4) | ||||||||||||||||||||||||||
| 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 | 992,923.4 | 992,923.4 | 992,923.4 | 371.3 | |||||||||||||||||||||||
| Other comprehensive income (loss), net of income tax | 42,430.1 | (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 | 992,873.9 | 992,873.9 | 51,560.0 | (10,327.4) | 1,411.6 | 42,644.2 | 1,035,518.1 | 206.7 | |||||||||||||||||||
| 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) | ||||||||||||||||||||||||||
| 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 | ||||||||||||||||||||||||||
| 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 (loss) 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 | $ 259,303.8 | 69,330.3 | 311,147.0 | 3,154.3 | 2,280,589.9 | 2,594,891.2 | (11,743.3) | (10,056.4) | 1,479.3 | (185.2) | (20,505.6) | 2,903,019.7 | 14,812.7 | ||||||||||||||
| Ending balance, shares at Dec. 31, 2022 | shares | 25,930.3 | 25,930.3 | ||||||||||||||||||||||||||
| Special capital reserve | (3,154.3) | 3,154.3 | ||||||||||||||||||||||||||
| Cash dividends to shareholders | (317,663.2) | (317,663.2) | (317,663.2) | (317,663.2) | ||||||||||||||||||||||||
| Total | (317,663.2) | $ (3,154.3) | (314,508.9) | (317,663.2) | (317,663.2) | |||||||||||||||||||||||
| Net income | 851,027.7 | $ 27,793.2 | 851,740.0 | 851,740.0 | 851,740.0 | (712.3) | ||||||||||||||||||||||
| Other comprehensive income (loss), net of income tax | (8,813.7) | (287.8) | (484.9) | (484.9) | (13,573.5) | 6,108.4 | (38.2) | (7,503.3) | (7,988.2) | (825.5) | ||||||||||||||||||
| Total comprehensive income (loss) | 842,214.0 | 27,505.4 | 851,255.1 | 851,255.1 | (13,573.5) | 6,108.4 | (38.2) | (7,503.3) | 843,751.8 | (1,537.8) | ||||||||||||||||||
| Disposal of investments accounted for using equity method | (18.5) | (18.1) | (18.1) | (0.4) | ||||||||||||||||||||||||
| Employee restricted shares retired | 4.6 | $ (4.2) | 4.2 | 4.6 | 4.6 | 4.6 | ||||||||||||||||||||||
| Employee restricted shares retired, shares | shares | (0.4) | (0.4) | ||||||||||||||||||||||||||
| Share-based payment arrangements | 477.7 | $ 21.1 | 564.9 | (108.3) | (108.3) | 477.7 | ||||||||||||||||||||||
| Share-based payment arrangements, shares | shares | 2.1 | 2.1 | ||||||||||||||||||||||||||
| Disposal of investments in equity instruments at fair value through other comprehensive income | 151.9 | 151.9 | (151.9) | (151.9) | ||||||||||||||||||||||||
| Basis adjustment for gain (loss) on hedging instruments | (45.2) | (45.2) | (45.2) | (45.2) | ||||||||||||||||||||||||
| From share of changes in equities of subsidiaries | 11,244.7 | (21.3) | (21.3) | 11,266.0 | ||||||||||||||||||||||||
| Donation from shareholders | 16.4 | 16.4 | 16.4 | |||||||||||||||||||||||||
| Decrease in non-controlling interests | (196.4) | (196.4) | ||||||||||||||||||||||||||
| Ending balance at Dec. 31, 2023 | $ 3,453,866.5 | $ 112,797.8 | $ 259,320.7 | $ 8,469.0 | $ 69,876.4 | $ 2,282.1 | $ 311,147.0 | $ 10,161.5 | $ 2,817,492.6 | $ 92,014.8 | $ 3,128,639.6 | $ 102,176.3 | $ (25,316.8) | $ (826.8) | $ (4,099.9) | $ (133.9) | $ 1,395.9 | $ 45.6 | $ (293.5) | $ (9.6) | $ (28,314.3) | $ (924.7) | $ 3,429,522.4 | $ 112,002.7 | $ 24,344.1 | $ 795.1 | ||
| Ending balance, shares at Dec. 31, 2023 | shares | 25,932.0 | 25,932.0 |