XML 112 R94.htm IDEA: XBRL DOCUMENT v3.22.1
Property, Plant and Equipment - Summary of assets subject to operating leases (Detail)
$ in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2021
TWD ($)
Dec. 31, 2021
USD ($)
Dec. 31, 2020
TWD ($)
Dec. 31, 2019
TWD ($)
Disclosure Of Property Plant And Equipment Subject To Operating Lease [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
Buildings used to operating leases [member]        
Disclosure Of Property Plant And Equipment Subject To Operating Lease [Line Items]        
Beginning balance 1,003.2   63.5  
Ending balance 4.7   1,003.2 63.5
Cost [member] | Buildings used to operating leases [member]        
Disclosure Of Property Plant And Equipment Subject To Operating Lease [Line Items]        
Beginning balance 1,426.6   562.6 562.6
Transfers to assets subject to operating leases (1,479.1)   (23.1)  
Transfers from assets subject to operating leases 244.6   1,199.0  
Disposals or retirements     (311.9)  
Ending balance 192.1   1,426.6 562.6
Accumulated depreciation [member] | Buildings used to operating leases [member]        
Disclosure Of Property Plant And Equipment Subject To Operating Lease [Line Items]        
Beginning balance 423.4   499.1 474.9
Additions 147.6   35.7 24.2
Transfers to assets subject to operating leases (451.9)   (8.2)  
Transfers from assets subject to operating leases 68.3   202.6  
Disposals or retirements     (305.8)  
Ending balance 187.4   423.4 499.1
Buildings [member] | Buildings used to operating leases [member]        
Disclosure Of Property Plant And Equipment Subject To Operating Lease [Line Items]        
Beginning balance 26.2   63.5  
Ending balance 4.7   26.2 63.5
Buildings [member] | Cost [member] | Buildings used to operating leases [member]        
Disclosure Of Property Plant And Equipment Subject To Operating Lease [Line Items]        
Beginning balance 227.6   562.6 562.6
Transfers to assets subject to operating leases (35.5)   (23.1)  
Disposals or retirements     (311.9)  
Ending balance 192.1   227.6 562.6
Buildings [member] | Accumulated depreciation [member] | Buildings used to operating leases [member]        
Disclosure Of Property Plant And Equipment Subject To Operating Lease [Line Items]        
Beginning balance 201.4   499.1 474.9
Additions 1.1   16.3 24.2
Transfers to assets subject to operating leases (15.1)   (8.2)  
Disposals or retirements     (305.8)  
Ending balance 187.4   201.4 $ 499.1
Machinery and equipment [member] | Buildings used to operating leases [member]        
Disclosure Of Property Plant And Equipment Subject To Operating Lease [Line Items]        
Beginning balance 977.0      
Ending balance     977.0  
Machinery and equipment [member] | Cost [member] | Buildings used to operating leases [member]        
Disclosure Of Property Plant And Equipment Subject To Operating Lease [Line Items]        
Beginning balance 1,199.0      
Transfers to assets subject to operating leases (1,443.6)      
Transfers from assets subject to operating leases 244.6   1,199.0  
Ending balance     1,199.0  
Machinery and equipment [member] | Accumulated depreciation [member] | Buildings used to operating leases [member]        
Disclosure Of Property Plant And Equipment Subject To Operating Lease [Line Items]        
Beginning balance 222.0      
Additions 146.5   19.4  
Transfers to assets subject to operating leases (436.8)      
Transfers from assets subject to operating leases $ 68.3   202.6  
Ending balance     $ 222.0