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v3.22.1

Property, Plant and Equipment - Summary of assets used by the Company (Detail) $ in Millions, $ in Millions | 12 Months Ended
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Dec. 31, 2021 TWD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 TWD ($) | Dec. 31, 2019 TWD ($)
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning balance | $ 1,555,589.1 |  | $ 1,352,377.4 |
Additions | 835,406.3 |  | 525,720.7 | $ 564,283.0
Ending balance | 1,975,118.7 | $ 71,201.1 | 1,555,589.1 | 1,352,377.4
Property, plant and equipment not subject to operating leases [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning balance | 1,554,585.9 |  | 1,352,313.9 |
Ending balance | 1,975,114.0 |  | 1,554,585.9 | 1,352,313.9
Cost [member] | Property, plant and equipment not subject to operating leases [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning balance | 4,426,223.8 |  | 3,911,596.3 | 3,372,216.5
Additions | 835,406.3 |  | 525,720.7 | 564,283.0
Disposals or retirements | (26,566.7) |  | (7,172.9) | (18,583.9)
Transfers from assets subject to operating leases | 1,479.1 |  | 23.1 |
Transfers to assets subject to operating leases | (244.6) |  | (1,199.0) |
Transfers from right-of-use assets |  |  |  | 619.8
Effect of disposal of subsidiary |  |  |  | (0.5)
Effect of exchange rate changes | 847.2 |  | (2,744.4) | (6,938.6)
Ending balance | 5,237,145.1 |  | 4,426,223.8 | 3,911,596.3
Accumulated depreciation [member] | Property, plant and equipment not subject to operating leases [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning balance | 2,871,637.9 |  | 2,559,282.4 | 2,300,253.9
Additions | 411,483.9 |  | 321,821.1 | 278,764.9
Disposals or retirements | (22,599.2) |  | (6,773.2) | (14,067.3)
Reversal of impairment |  |  |  | (301.4)
Transfers from assets subject to operating leases | 451.9 |  | 8.2 |
Transfers to assets subject to operating leases | (68.3) |  | (202.6) |
Transfers from right-of-use assets |  |  |  | 20.7
Effect of disposal of subsidiary |  |  |  | (0.5)
Impairment | 274.4 |  | 10.2 |
Effect of exchange rate changes | 850.5 |  | (2,508.2) | (5,387.9)
Ending balance | 3,262,031.1 |  | 2,871,637.9 | 2,559,282.4
Land and Land Improvements [Member] | Property, plant and equipment not subject to operating leases [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning balance | 3,436.5 |  | 3,453.1 |
Ending balance | 5,988.4 |  | 3,436.5 | 3,453.1
Land and Land Improvements [Member] | Cost [member] | Property, plant and equipment not subject to operating leases [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning balance | 3,942.6 |  | 3,991.8 | 4,011.4
Additions | 2,587.2 |  |  |
Effect of exchange rate changes | (41.6) |  | (49.2) | (19.6)
Ending balance | 6,488.2 |  | 3,942.6 | 3,991.8
Land and Land Improvements [Member] | Accumulated depreciation [member] | Property, plant and equipment not subject to operating leases [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning balance | 506.1 |  | 538.7 | 550.6
Additions | 1.3 |  | 1.5 | 1.6
Effect of exchange rate changes | (7.6) |  | (34.1) | (13.5)
Ending balance | 499.8 |  | 506.1 | 538.7
Buildings [member] | Property, plant and equipment not subject to operating leases [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning balance | 250,647.9 |  | 195,015.7 |
Ending balance | 270,432.5 |  | 250,647.9 | 195,015.7
Buildings [member] | Cost [member] | Property, plant and equipment not subject to operating leases [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning balance | 522,447.4 |  | 438,075.0 | 418,151.7
Additions | 53,971.3 |  | 84,882.5 | 21,448.5
Disposals or retirements | (41.1) |  | (41.5) | (159.0)
Transfers from assets subject to operating leases | 35.5 |  | 23.1 |
Effect of exchange rate changes | 184.7 |  | (491.7) | (1,366.2)
Ending balance | 576,597.8 |  | 522,447.4 | 438,075.0
Buildings [member] | Accumulated depreciation [member] | Property, plant and equipment not subject to operating leases [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning balance | 271,799.5 |  | 243,059.3 | 217,899.2
Additions | 34,331.6 |  | 29,209.1 | 26,026.6
Disposals or retirements | (36.5) |  | (27.9) | (144.4)
Transfers from assets subject to operating leases | 15.1 |  | 8.2 |
Effect of exchange rate changes | 55.6 |  | (449.2) | (722.1)
Ending balance | 306,165.3 |  | 271,799.5 | 243,059.3
Machinery and equipment |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Reversal of impairment | (274.4) |  |  | (301.4)
Machinery and equipment | Property, plant and equipment not subject to operating leases [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning balance | 1,051,475.7 |  | 608,357.0 |
Ending balance | 1,081,209.8 |  | 1,051,475.7 | 608,357.0
Machinery and equipment | Cost [member] | Property, plant and equipment not subject to operating leases [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning balance | 3,607,005.7 |  | 2,886,623.0 | 2,728,760.2
Additions | 401,659.0 |  | 729,943.3 | 179,798.4
Disposals or retirements | (26,192.2) |  | (6,397.3) | (17,381.6)
Transfers from assets subject to operating leases | 1,443.6 |  |  |
Transfers to assets subject to operating leases | (244.6) |  | (1,199.0) |
Transfers from right-of-use assets |  |  |  | 619.8
Effect of exchange rate changes | 1,077.7 |  | (1,964.3) | (5,173.8)
Ending balance | 3,984,749.2 |  | 3,607,005.7 | 2,886,623.0
Machinery and equipment | Accumulated depreciation [member] | Property, plant and equipment not subject to operating leases [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning balance | 2,555,530.0 |  | 2,278,266.0 | 2,049,279.0
Additions | 368,777.7 |  | 285,393.6 | 246,724.2
Disposals or retirements | (22,230.1) |  | (6,012.9) | (12,880.8)
Reversal of impairment |  |  |  | (301.4)
Transfers from assets subject to operating leases | 436.8 |  |  |
Transfers to assets subject to operating leases | (68.3) |  | (202.6) |
Transfers from right-of-use assets |  |  |  | 20.7
Impairment | 274.4 |  | 10.2 |
Effect of exchange rate changes | 818.9 |  | (1,924.3) | (4,575.7)
Ending balance | 2,903,539.4 |  | 2,555,530.0 | 2,278,266.0
Office equipment [member] | Property, plant and equipment not subject to operating leases [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning balance | 25,060.4 |  | 17,193.0 |
Ending balance | 24,327.6 |  | 25,060.4 | 17,193.0
Office equipment [member] | Cost [member] | Property, plant and equipment not subject to operating leases [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning balance | 68,862.7 |  | 54,611.4 | 48,382.2
Additions | 7,643.0 |  | 15,112.9 | 7,415.0
Disposals or retirements | (333.4) |  | (734.1) | (1,043.3)
Effect of disposal of subsidiary |  |  |  | (0.5)
Effect of exchange rate changes | (18.1) |  | (127.5) | (142.0)
Ending balance | 76,154.2 |  | 68,862.7 | 54,611.4
Office equipment [member] | Accumulated depreciation [member] | Property, plant and equipment not subject to operating leases [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning balance | 43,802.3 |  | 37,418.4 | 32,525.1
Additions | 8,373.3 |  | 7,216.9 | 6,012.5
Disposals or retirements | (332.6) |  | (732.4) | (1,042.1)
Effect of disposal of subsidiary |  |  |  | (0.5)
Effect of exchange rate changes | (16.4) |  | (100.6) | (76.6)
Ending balance | 51,826.6 |  | 43,802.3 | 37,418.4
Equipment under installation and construction in progress [member] | Property, plant and equipment not subject to operating leases [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning balance | 223,965.4 |  | 528,295.1 |
Ending balance | 593,155.7 |  | 223,965.4 | 528,295.1
Equipment under installation and construction in progress [member] | Cost [member] | Property, plant and equipment not subject to operating leases [member] |  |  |  |
Disclosure of detailed information about property, plant and equipment [line items] |  |  |  |
Beginning balance | 223,965.4 |  | 528,295.1 | 172,911.0
Additions | 369,545.8 |  | (304,218.0) | 355,621.1
Effect of exchange rate changes | (355.5) |  | (111.7) | (237.0)
Ending balance | $ 593,155.7 |  | $ 223,965.4 | $ 528,295.1

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