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v3.23.1

Cash Flow Information - Schedule of Detailed Information about Non Cash Transaction (Detail) $ in Millions, $ in Millions | 12 Months Ended
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Dec. 31, 2022 TWD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2021 TWD ($) | Dec. 31, 2020 TWD ($)
Disclosure of detailed information about non-cash transaction [line items] |  |  |  |
Payments for acquisition of financial assets at FVTOCI | $ 54,566.7 | $ 1,775.7 | $ 255,888.7 | $ 262,637.5
Payments for acquisition of property, plant and equipment | 1,082,672.1 | 35,231.8 | 839,195.7 | 507,238.7
Changes in account payable | 7,594.1 | 247.1 | 8,298.3 | 404.6
Payments for acquisition of intangible assets | 6,954.3 | $ 226.3 | 9,040.7 | 9,542.4
Intangible assets [member] |  |  |  |
Disclosure of detailed information about non-cash transaction [line items] |  |  |  |
Changes in other financial assets | 7.6 |  | 2.9 | 10.5
Additions of intangible assets | 7,535.1 |  | 9,318.5 | 12,559.5
Changes in account payable | 0.0 |  | 0.0 | 191.4
Changes in accrued expenses and other current liabilities | (588.4) |  | (280.7) | (3,219.0)
Payments for acquisition of intangible assets | 6,954.3 |  | 9,040.7 | 9,542.4
Acquisition of financial assets at FVTOCI [Member] |  |  |  |
Disclosure of detailed information about non-cash transaction [line items] |  |  |  |
Additions of financial assets at FVTOCI | 45,126.2 |  | 253,613.9 | 268,653.5
Conversion of convertible bonds into equity securities | 0.0 |  | 0.0 | (120.5)
Exchange of equity instruments | 0.0 |  | (106.2) | 0.0
Payments for acquisition of financial assets at FVTOCI | 54,566.7 |  | 255,888.7 | 262,637.5
Changes in accrued expenses and other current liabilities | 9,440.5 |  | 2,381.0 | (5,895.5)
Disposal of financial assets at FVTOCI [Member] |  |  |  |
Disclosure of detailed information about non-cash transaction [line items] |  |  |  |
Changes in other financial assets | 1,832.5 |  | 3,509.3 | (2,079.9)
Exchange of equity instruments | 0.0 |  | (106.2) | 0.0
Disposal of financial assets at FVTOCI | 43,130.9 |  | 251,201.4 | 269,011.8
Proceeds from disposal of financial assets at FVTOCI | 44,963.4 |  | 254,604.5 | 266,931.9
Property, plant and equipment [member] |  |  |  |
Disclosure of detailed information about non-cash transaction [line items] |  |  |  |
Additions of property, plant and equipment | 1,139,892.1 |  | 835,406.3 | 525,720.7
Changes in other financial assets | 5,730.1 |  | 1,934.0 | 584.7
Exchange of assets | (275.6) |  | (3,256.5) | (1.1)
Changes in payables to contractors and equipment suppliers | (60,638.2) |  | 5,153.3 | (19,085.9)
Changes in accrued expenses and other current liabilities | 630.6 |  | 0.0 | 0.0
Capitalized interests | (2,666.9) |  | 0.0 | 0.0
Transferred to initial carrying amount of hedged items | 0.0 |  | (41.4) | 20.3
Payments for acquisition of property, plant and equipment | $ 1,082,672.1 |  | $ 839,195.7 | $ 507,238.7

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