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v3.21.1

Property, Plant and Equipment (Tables) | 12 Months Ended
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Dec. 31, 2020
Disclosure of detailed information about property, plant and equipment [line items] |
Summary of Property, Plant and Equipment |
|  | Land and Land Improvements |  |  | Buildings |  |  | Machinery and Equipment |  |  | Office Equipment |  |  | Equipment under Installation and Construction in Progress |  |  | Total |
|  | NT$ |  |  | NT$ |  |  | NT$ |  |  | NT$ |  |  | NT$ |  |  | NT$ |
|  | (In Millions) |  |  | (In Millions) |  |  | (In Millions) |  |  | (In Millions) |  |  | (In Millions) |  |  | (In Millions) |
Cost |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at January 1, 2018 |  | $ | 3,983.2 |  |  | $ | 379,134.6 |  |  | $ | 2,487,752.3 |  |  | $ | 42,391.5 |  |  | $ | 167,353.5 |  |  | $ | 3,080,615.1 |
Additions |  |  | — |  |  |  | 40,396.4 |  |  |  | 247,042.3 |  |  |  | 6,773.4 |  |  |  | 5,812.3 |  |  |  | 300,024.4 |
Disposals or retirements |  |  | — |  |  |  | (410.9 | ) |  |  | (5,972.5 | ) |  |  | (790.8 | ) |  |  | — |  |  |  | (7,174.2 | )
Effect of exchange rate changes |  |  | 28.2 |  |  |  | (405.8 | ) |  |  | (61.9 | ) |  |  | 8.1 |  |  |  | (254.8 | ) |  |  | (686.2 | )
Balance at December 31, 2018 |  | $ | 4,011.4 |  |  | $ | 418,714.3 |  |  | $ | 2,728,760.2 |  |  | $ | 48,382.2 |  |  | $ | 172,911.0 |  |  | $ | 3,372,779.1 |
Accumulated depreciation and impairment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at January 1, 2018 |  | $ | 510.5 |  |  | $ | 194,446.5 |  |  | $ | 1,795,448.9 |  |  | $ | 27,666.9 |  |  | $ | — |  |  | $ | 2,018,072.8 |
Additions |  |  | 20.9 |  |  |  | 24,293.4 |  |  |  | 258,195.3 |  |  |  | 5,615.3 |  |  |  | — |  |  |  | 288,124.9 |
Disposals or retirements |  |  | — |  |  |  | (399.0 | ) |  |  | (4,773.6 | ) |  |  | (790.0 | ) |  |  | — |  |  |  | (5,962.6 | )
Impairment |  |  | — |  |  |  | — |  |  |  | 423.5 |  |  |  | — |  |  |  | — |  |  |  | 423.5 |
Effect of exchange rate changes |  |  | 19.2 |  |  |  | 33.2 |  |  |  | (15.1 | ) |  |  | 32.9 |  |  |  | — |  |  |  | 70.2 |
Balance at December 31, 2018 |  | $ | 550.6 |  |  | $ | 218,374.1 |  |  | $ | 2,049,279.0 |  |  | $ | 32,525.1 |  |  | $ | — |  |  | $ | 2,300,728.8 |
Carrying amounts at December 31, 2018 |  | $ | 3,460.8 |  |  | $ | 200,340.2 |  |  | $ | 679,481.2 |  |  | $ | 15,857.1 |  |  | $ | 172,911.0 |  |  | $ | 1,072,050.3 |
Buildings [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Summary of maturity analysis of operating lease payments receivable | The maturity ana l ysis of operating lease payments receivable from the buildings and machinery and equipment is as follows:
|  | December 31, 2019 |  |  | December 31, 2020 |
|  | NT$ |  |  | NT$ |
|  | (In Millions) |  |  | (In Millions) |
Year 1 |  | $ | 18.4 |  |  | $ | 149.1 |
Year 2 |  |  | 17.0 |  |  |  | 17.0 |
Year 3 |  |  | 17.0 |  |  |  | — |
|  | $ | 52.4 |  |  | $ | 166.1 |
Property, plant and equipment not subject to operating leases [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Summary of Property, Plant and Equipment |
|  | Land and Land Improvements |  |  | Buildings |  |  | Machinery and Equipment |  |  | Office Equipment |  |  | Equipment under Installation and Construction in Progress |  |  | Total |
|  | NT$ |  |  | NT$ |  |  | NT$ |  |  | NT$ |  |  | NT$ |  |  | NT$ |
|  | (In Millions) |  |  | (In Millions) |  |  | (In Millions) |  |  | (In Millions) |  |  | (In Millions) |  |  | (In Millions) |
Cost |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at January 1, 2019 |  | $ | 4,011.4 |  |  | $ | 418,151.7 |  |  | $ | 2,728,760.2 |  |  | $ | 48,382.2 |  |  | $ | 172,911.0 |  |  | $ | 3,372,216.5 |
Additions |  |  | — |  |  |  | 21,448.5 |  |  |  | 179,798.4 |  |  |  | 7,415.0 |  |  |  | 355,621.1 |  |  |  | 564,283.0 |
Disposals or retirements |  |  | — |  |  |  | (159.0 | ) |  |  | (17,381.6 | ) |  |  | (1,043.3 | ) |  |  | — |  |  |  | (18,583.9 | )
Transfers from right-of-use assets |  |  | — |  |  |  | — |  |  |  | 619.8 |  |  |  | — |  |  |  | — |  |  |  | 619.8 |
Effect of disposal of subsidiary |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (0.5 | ) |  |  | — |  |  |  | (0.5 | )
Effect of exchange rate changes |  |  | (19.6 | ) |  |  | (1,366.2 | ) |  |  | (5,173.8 | ) |  |  | (142.0 | ) |  |  | (237.0 | ) |  |  | (6,938.6 | )
Balance at December 31, 2019 |  | $ | 3,991.8 |  |  | $ | 438,075.0 |  |  | $ | 2,886,623.0 |  |  | $ | 54,611.4 |  |  | $ | 528,295.1 |  |  | $ | 3,911,596.3 |
Accumulated depreciation and impairment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at January 1, 2019 |  | $ | 550.6 |  |  | $ | 217,899.2 |  |  | $ | 2,049,279.0 |  |  | $ | 32,525.1 |  |  | $ | — |  |  | $ | 2,300,253.9 |
Additions |  |  | 1.6 |  |  |  | 26,026.6 |  |  |  | 246,724.2 |  |  |  | 6,012.5 |  |  |  | — |  |  |  | 278,764.9 |
Disposals or retirements |  |  | — |  |  |  | (144.4 | ) |  |  | (12,880.8 | ) |  |  | (1,042.1 | ) |  |  | — |  |  |  | (14,067.3 | )
Transfers from right-of-use assets |  |  | — |  |  |  | — |  |  |  | 20.7 |  |  |  | — |  |  |  | — |  |  |  | 20.7 |
Reversal of impairment |  |  | — |  |  |  | — |  |  |  | (301.4 | ) |  |  | — |  |  |  | — |  |  |  | (301.4 | )
Effect of disposal of subsidiary |  |  | — |  |  |  | — |  |  |  | — |  |  |  | (0.5 | ) |  |  | — |  |  |  | (0.5 | )
Effect of exchange rate changes |  |  | (13.5 | ) |  |  | (722.1 | ) |  |  | (4,575.7 | ) |  |  | (76.6 | ) |  |  | — |  |  |  | (5,387.9 | )
Balance at December 31, 2019 |  | $ | 538.7 |  |  | $ | 243,059.3 |  |  | $ | 2,278,266.0 |  |  | $ | 37,418.4 |  |  | $ | — |  |  | $ | 2,559,282.4 |
Carrying amounts at December 31, 2019 |  | $ | 3,453.1 |  |  | $ | 195,015.7 |  |  | $ | 608,357.0 |  |  | $ | 17,193.0 |  |  | $ | 528,295.1 |  |  | $ | 1,352,313.9 |
Cost |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at January 1, 2020 |  | $ | 3,991.8 |  |  | $ | 438,075.0 |  |  | $ | 2,886,623.0 |  |  | $ | 54,611.4 |  |  | $ | 528,295.1 |  |  | $ | 3,911,596.3 |
Additions (deductions) |  |  | — |  |  |  | 84,882.5 |  |  |  | 729,943.3 |  |  |  | 15,112.9 |  |  |  | (304,218.0 | ) |  |  | 525,720.7 |
Disposals or retirements |  |  | — |  |  |  | (41.5 | ) |  |  | (6,397.3 | ) |  |  | (734.1 | ) |  |  | — |  |  |  | (7,172.9 | )
Transfers from assets subject to operating leases |  |  | — |  |  |  | 23.1 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 23.1 |
Transfers to assets subject to operating leases |  |  | — |  |  |  | — |  |  |  | (1,199.0 | ) |  |  | — |  |  |  | — |  |  |  | (1,199.0 | )
Effect of exchange rate changes |  |  | (49.2 | ) |  |  | (491.7 | ) |  |  | (1,964.3 | ) |  |  | (127.5 | ) |  |  | (111.7 | ) |  |  | (2,744.4 | )
Balance at December 31, 2020 |  | $ | 3,942.6 |  |  | $ | 522,447.4 |  |  | $ | 3,607,005.7 |  |  | $ | 68,862.7 |  |  | $ | 223,965.4 |  |  | $ | 4,426,223.8 |
Accumulated depreciation and impairment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Balance at January 1, 2020 |  | $ | 538.7 |  |  | $ | 243,059.3 |  |  | $ | 2,278,266.0 |  |  | $ | 37,418.4 |  |  | $ | — |  |  | $ | 2,559,282.4 |
Additions |  |  | 1.5 |  |  |  | 29,209.1 |  |  |  | 285,393.6 |  |  |  | 7,216.9 |  |  |  | — |  |  |  | 321,821.1 |
Disposals or retirements |  |  | — |  |  |  | (27.9 | ) |  |  | (6,012.9 | ) |  |  | (732.4 | ) |  |  | — |  |  |  | (6,773.2 | )
Transfers from assets subject to operating leases |  |  | — |  |  |  | 8.2 |  |  |  | — |  |  |  | — |  |  |  | — |  |  |  | 8.2 |
Transfers to assets subject to operating leases |  |  | — |  |  |  | — |  |  |  | (202.6 | ) |  |  | — |  |  |  | — |  |  |  | (202.6 | )
Impairment |  |  | — |  |  |  | — |  |  |  | 10.2 |  |  |  | — |  |  |  | — |  |  |  | 10.2 |
Effect of exchange rate changes |  |  | (34.1 | ) |  |  | (449.2 | ) |  |  | (1,924.3 | ) |  |  | (100.6 | ) |  |  | — |  |  |  | (2,508.2 | )
Balance at December 31, 2020 |  | $ | 506.1 |  |  | $ | 271,799.5 |  |  | $ | 2,555,530.0 |  |  | $ | 43,802.3 |  |  | $ | — |  |  | $ | 2,871,637.9 |
Carrying amounts at December 31, 2020 |  | $ | 3,436.5 |  |  | $ | 250,647.9 |  |  | $ | 1,051,475.7 |  |  | $ | 25,060.4 |  |  | $ | 223,965.4 |  |  | $ | 1,554,585.9 |
Property, plant and equipment subject to operating leases [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Summary of Property, Plant and Equipment |
|  | Buildings |  |  | Machinery and Equipment |  |  | Total |
|  | NT$ |  |  | NT$ |  |  | NT$ |
|  | (In Millions) |  |  | (In Millions) |  |  | (In Millions) |
Cost |  |  |  |  |  |  |  |  |  |  |  |
Balance at January 1, 2019 |  | $ | 562.6 |  |  | $ | — |  |  | $ | 562.6 |
Balance at December 31, 2019 |  | $ | 562.6 |  |  | $ | — |  |  | $ | 562.6 |
Accumulated depreciation |  |  |  |  |  |  |  |  |  |  |  |
Balance at January 1, 2019 |  | $ | 474.9 |  |  | $ | — |  |  | $ | 474.9 |
Additions |  |  | 24.2 |  |  |  | — |  |  |  | 24.2 |
Balance at December 31, 2019 |  | $ | 499.1 |  |  | $ | — |  |  | $ | 499.1 |
Carrying amounts at December 31, 2019 |  | $ | 63.5 |  |  | $ | — |  |  | $ | 63.5 |
Cost |  |  |  |  |  |  |  |  |  |  |  |
Balance at January 1, 2020 |  | $ | 562.6 |  |  | $ | — |  |  | $ | 562.6 |
Disposals or retirements |  |  | (311.9 | ) |  |  | — |  |  |  | (311.9 | )
Transfers to assets used by the Company |  |  | (23.1 | ) |  |  | — |  |  |  | (23.1 | )
Transfers from assets used by the Company |  |  | — |  |  |  | 1,199.0 |  |  |  | 1,199.0 |
Balance at December 31, 2020 |  | $ | 227.6 |  |  | $ | 1,199.0 |  |  | $ | 1,426.6 |
Accumulated depreciation |  |  |  |  |  |  |  |  |  |  |  |
Balance at January 1, 2020 |  | $ | 499.1 |  |  | $ | — |  |  | $ | 499.1 |
Additions |  |  | 16.3 |  |  |  | 19.4 |  |  |  | 35.7 |
Disposals or retirements |  |  | (305.8 | ) |  |  | — |  |  |  | (305.8 | )
Transfers to assets used by the Company |  |  | (8.2 | ) |  |  | — |  |  |  | (8.2 | )
Transfers from assets used by the Company |  |  | — |  |  |  | 202.6 |  |  |  | 202.6 |
Balance at December 31, 2020 |  | $ | 201.4 |  |  | $ | 222.0 |  |  | $ | 423.4 |
Carrying amounts at December 31, 2020 |  | $ | 26.2 |  |  | $ | 977.0 |  |  | $ | 1,003.2 |
Property plant and equipment including subject and not subject to operating leases [member] |
Disclosure of detailed information about property, plant and equipment [line items] |
Summary of Property, Plant and Equipment |
|  | December 31, 2019 |  |  | December 31, 2020 |
|  | NT$ |  |  | NT$ |
|  | (In Millions) |  |  | (In Millions) |
Assets used by the Company |  | $ | 1,352,313.9 |  |  | $ | 1,554,585.9 |
Assets subject to operating leases |  |  | 63.5 |  |  |  | 1,003.2 |
|  | $ | 1,352,377.4 |  |  | $ | 1,555,589.1 |

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