XML 139 R124.htm IDEA: XBRL DOCUMENT v3.19.1
Property, Plant and Equipment - Summary of Property, Plant and Equipment (Detail)
$ in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2018
TWD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
TWD ($)
Dec. 31, 2016
TWD ($)
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance $ 288,708      
Depreciation expenses (27,461)   $ (28,143) $ (29,087)
Additions 27,979   26,069 24,591
Impairment losses 0 $ 0 0 596
Ending balance 288,914 $ 9,439 288,708  
Gross carrying amount [Member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance 946,460   936,128 925,434
Additions 27,979   26,069 24,591
Disposal (33,350)   (15,448) (13,810)
Effect of foreign exchange differences 60   (176) (42)
Others (258)   (113) (45)
Ending balance 940,891   946,460 936,128
Accumulated depreciation, amortization and impairment [Member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance (657,752)   (644,958) (629,035)
Depreciation expenses (27,461)   (28,143) (29,087)
Disposal 33,228   15,182 13,718
Impairment losses       (596)
Effect of foreign exchange differences (20)   47 12
Others 28   120 30
Ending balance (651,977)   (657,752) (644,958)
Land [Member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance 104,079      
Ending balance 103,972   104,079  
Land [Member] | Gross carrying amount [Member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance 104,079   103,872 102,747
Additions 0   0 791
Disposal (71)   (158) (2)
Effect of foreign exchange differences 0   0 0
Others (36)   365 336
Ending balance 103,972   104,079 103,872
Land [Member] | Accumulated depreciation, amortization and impairment [Member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance 0   0 0
Depreciation expenses 0   0 0
Disposal 0   0 0
Impairment losses       0
Effect of foreign exchange differences 0   0 0
Others 0   0 0
Ending balance 0   0 0
Land improvements [Member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance 302      
Ending balance 263   302  
Land improvements [Member] | Gross carrying amount [Member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance 1,595   1,581 1,575
Additions 0   0 0
Disposal 0   (5) (6)
Effect of foreign exchange differences 0   0 0
Others 6   19 12
Ending balance 1,601   1,595 1,581
Land improvements [Member] | Accumulated depreciation, amortization and impairment [Member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance (1,293)   (1,248) (1,203)
Depreciation expenses (45)   (50) (51)
Disposal 0   4 6
Impairment losses       0
Effect of foreign exchange differences 0   0 0
Others 0   1 0
Ending balance (1,338)   (1,293) (1,248)
Buildings [Member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance 45,895      
Ending balance 44,784   45,895  
Buildings [Member] | Gross carrying amount [Member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance 72,694   67,738 67,790
Additions 21   30 36
Disposal 0   (108) (35)
Effect of foreign exchange differences 0   0 0
Others 196   5,034 (53)
Ending balance 72,911   72,694 67,738
Buildings [Member] | Accumulated depreciation, amortization and impairment [Member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance (26,799)   (25,591) (24,421)
Depreciation expenses (1,356)   (1,402) (1,269)
Disposal 0   47 34
Impairment losses       0
Effect of foreign exchange differences 0   0 0
Others 28   147 65
Ending balance (28,127)   (26,799) (25,591)
Computer equipment [Member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance 2,374      
Ending balance 2,115   2,374  
Computer equipment [Member] | Gross carrying amount [Member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance 14,162   14,295 14,996
Additions 52   78 42
Disposal (643)   (974) (1,546)
Effect of foreign exchange differences 0   (1) (3)
Others 687   764 806
Ending balance 14,258   14,162 14,295
Computer equipment [Member] | Accumulated depreciation, amortization and impairment [Member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance (11,788)   (11,582) (11,715)
Depreciation expenses (983)   (1,192) (1,332)
Disposal 632   967 1,529
Impairment losses       0
Effect of foreign exchange differences 0   0 1
Others (4)   19 (65)
Ending balance (12,143)   (11,788) (11,582)
Telecommunications equipment [Member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance 114,900      
Impairment losses       596
Ending balance 116,322   114,900  
Telecommunications equipment [Member] | Gross carrying amount [Member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance 722,054   715,692 705,372
Additions 159   193 171
Disposal (31,984)   (13,739) (11,542)
Effect of foreign exchange differences 60   (172) (35)
Others 25,459   20,080 21,726
Ending balance 715,748   722,054 715,692
Telecommunications equipment [Member] | Accumulated depreciation, amortization and impairment [Member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance (607,154)   (596,497) (582,205)
Depreciation expenses (24,236)   (24,492) (25,280)
Disposal 31,952   13,712 11,512
Impairment losses       (596)
Effect of foreign exchange differences (20)   45 7
Others 32   78 65
Ending balance (599,426)   (607,154) (596,497)
Transportation equipment [Member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance 321      
Ending balance 231   321  
Transportation equipment [Member] | Gross carrying amount [Member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance 3,834   3,866 3,815
Additions 0   1 1
Disposal (29)   (62) (54)
Effect of foreign exchange differences 0   0 0
Others 77   29 104
Ending balance 3,882   3,834 3,866
Transportation equipment [Member] | Accumulated depreciation, amortization and impairment [Member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance (3,513)   (3,237) (2,750)
Depreciation expenses (162)   (330) (529)
Disposal 29   63 54
Impairment losses       0
Effect of foreign exchange differences 0   0 0
Others (5)   (9) (12)
Ending balance (3,651)   (3,513) (3,237)
Miscellaneous equipment [Member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance 2,310      
Ending balance 2,582   2,310  
Miscellaneous equipment [Member] | Gross carrying amount [Member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance 9,515   8,943 8,737
Additions 334   193 255
Disposal (623)   (402) (625)
Effect of foreign exchange differences 0   (3) (4)
Others 648   784 580
Ending balance 9,874   9,515 8,943
Miscellaneous equipment [Member] | Accumulated depreciation, amortization and impairment [Member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance (7,205)   (6,803) (6,741)
Depreciation expenses (679)   (677) (626)
Disposal 615   389 583
Impairment losses       0
Effect of foreign exchange differences 0   2 4
Others (23)   (116) (23)
Ending balance (7,292)   (7,205) (6,803)
Construction in progress and equipment to be accepted [Member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance 18,527      
Ending balance 18,645   18,527  
Construction in progress and equipment to be accepted [Member] | Gross carrying amount [Member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance 18,527   20,141 20,402
Additions 27,413   25,574 23,295
Disposal 0   0 0
Effect of foreign exchange differences 0   0 0
Others (27,295)   (27,188) (23,556)
Ending balance 18,645   18,527 20,141
Construction in progress and equipment to be accepted [Member] | Accumulated depreciation, amortization and impairment [Member]        
Disclosure of detailed information about property, plant and equipment [Line Items]        
Beginning balance 0   0 0
Depreciation expenses 0   0 0
Disposal 0   0 0
Impairment losses       0
Effect of foreign exchange differences 0   0 0
Others 0   0 0
Ending balance $ 0   $ 0 $ 0