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Segment Information (Tables) | 12 Months Ended
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Dec. 31, 2020
Disclosure Of Operating Segments [Abstract] |
Analysis by Reportable Segment of Revenue and Operating Results of Continuing Operations | Analysis by reportable segment of revenues and operating results of continuing operations are as follows:
|  | Domestic Fixed Communi- cations Business |  |  | Mobile Communi- cations Business |  |  | Internet Business |  |  | International Fixed Communi- cations Business |  |  | Others |  |  | Total |
|  | NT$ |  |  | NT$ |  |  | NT$ |  |  | NT$ |  |  | NT$ |  |  | NT$ |
|  | (In Millions) |
Year ended December 31, 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
From external customers |  | $ | 66,753 |  |  | $ | 100,937 |  |  | $ | 29,813 |  |  | $ | 13,435 |  |  | $ | 4,545 |  |  | $ | 215,483 |
Intersegment revenues |  |  | 17,125 |  |  |  | 1,702 |  |  |  | 4,038 |  |  |  | 2,234 |  |  |  | 5,008 |  |  |  | 30,107 |
Segment revenues |  | $ | 83,878 |  |  | $ | 102,639 |  |  | $ | 33,851 |  |  | $ | 15,669 |  |  | $ | 9,553 |  |  |  | 245,590 |
Intersegment elimination |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (30,107 | )
Consolidated revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ | 215,483 |
Segment income (loss) before income tax |  | $ | 18,243 |  |  | $ | 15,328 |  |  | $ | 11,944 |  |  | $ | 1,024 |  |  | $ | (1,553 | ) |  | $ | 44,986 |
Year ended December 31, 2019 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
From external customers |  | $ | 65,728 |  |  | $ | 95,469 |  |  | $ | 30,091 |  |  | $ | 11,485 |  |  | $ | 4,747 |  |  | $ | 207,520 |
Intersegment revenues |  |  | 16,065 |  |  |  | 1,564 |  |  |  | 3,951 |  |  |  | 2,079 |  |  |  | 4,914 |  |  |  | 28,573 |
Segment revenues |  | $ | 81,793 |  |  | $ | 97,033 |  |  | $ | 34,042 |  |  | $ | 13,564 |  |  | $ | 9,661 |  |  |  | 236,093 |
Intersegment elimination |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (28,573 | )
Consolidated revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ | 207,520 |
Segment income (loss) before income tax |  | $ | 19,537 |  |  | $ | 11,250 |  |  | $ | 12,515 |  |  | $ | 799 |  |  | $ | (2,234 | ) |  | $ | 41,867 |
Year ended December 31, 2020 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
From external customers |  | $ | 69,469 |  |  | $ | 90,230 |  |  | $ | 32,115 |  |  | $ | 8,695 |  |  | $ | 7,100 |  |  | $ | 207,609 |
Intersegment revenues |  |  | 15,930 |  |  |  | 1,536 |  |  |  | 3,966 |  |  |  | 1,875 |  |  |  | 5,369 |  |  |  | 28,676 |
Segment revenues |  | $ | 85,399 |  |  | $ | 91,766 |  |  | $ | 36,081 |  |  | $ | 10,570 |  |  | $ | 12,469 |  |  |  | 236,285 |
Intersegment elimination |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (28,676 | )
Consolidated revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ | 207,609 |
Segment income (loss) before income tax |  | $ | 22,504 |  |  | $ | 8,777 |  |  | $ | 13,120 |  |  | $ | 829 |  |  | $ | (2,404 | ) |  | $ | 42,826 |
Other Segment Information | Other information reviewed by the chief operating decision maker or regularly provided to the chief operating decision maker was as follows: For the year ended December 31, 2018
|  | Domestic Fixed Communi- cations Business |  |  | Mobile Communi- cations Business |  |  | Internet Business |  |  | International Fixed Communi- cations Business |  |  | Others |  |  | Total |
|  | NT$ |  |  | NT$ |  |  | NT$ |  |  | NT$ |  |  | NT$ |  |  | NT$ |
|  | (In Millions) |
Share of profits of associates and joint ventures accounted for using equity method |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 509 |  |  | $ | 509 |
Interest income |  | $ | 18 |  |  | $ | 12 |  |  | $ | 19 |  |  | $ | 28 |  |  | $ | 120 |  |  | $ | 197 |
Interest expenses |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 18 |  |  | $ | 18 |
Operating costs and expenses |  | $ | 59,430 |  |  | $ | 73,901 |  |  | $ | 13,766 |  |  | $ | 13,279 |  |  | $ | 11,573 |  |  | $ | 171,949 |
Depreciation and amortization |  | $ | 15,027 |  |  | $ | 13,788 |  |  | $ | 3,121 |  |  | $ | 1,425 |  |  | $ | 448 |  |  | $ | 33,809 |
Capital expenditure |  | $ | 12,693 |  |  | $ | 10,664 |  |  | $ | 2,729 |  |  | $ | 1,348 |  |  | $ | 1,116 |  |  | $ | 28,550 |
Reversal of impairment loss on investment properties |  | $ | 19 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 19 |
Impairment loss on intangible assets |  | $ | — |  |  | $ | 51 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 51 |
For the year ended December 31, 2019
|  | Domestic Fixed Communi- cations Business |  |  | Mobile Communi- cations Business |  |  | Internet Business |  |  | International Fixed Communi- cations Business |  |  | Others |  |  | Total |
|  | NT$ |  |  | NT$ |  |  | NT$ |  |  | NT$ |  |  | NT$ |  |  | NT$ |
|  | (In Millions) |
Share of profits of associates and joint ventures accounted for using equity method |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 459 |  |  | $ | 459 |
Interest income |  | $ | 15 |  |  | $ | 9 |  |  | $ | 20 |  |  | $ | 41 |  |  | $ | 166 |  |  | $ | 251 |
Interest expenses |  | $ | 5 |  |  | $ | 58 |  |  | $ | 1 |  |  | $ | 12 |  |  | $ | 28 |  |  | $ | 104 |
Operating costs and expenses |  | $ | 56,269 |  |  | $ | 72,952 |  |  | $ | 13,850 |  |  | $ | 11,427 |  |  | $ | 12,249 |  |  | $ | 166,747 |
Depreciation and amortization |  | $ | 14,842 |  |  | $ | 16,254 |  |  | $ | 2,914 |  |  | $ | 1,547 |  |  | $ | 792 |  |  | $ | 36,349 |
Capital expenditure |  | $ | 12,071 |  |  | $ | 7,773 |  |  | $ | 1,425 |  |  | $ | 1,117 |  |  | $ | 1,780 |  |  | $ | 24,166 |
Impairment loss on property, plant and equipment |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 93 |  |  | $ | 93 |
Reversal of impairment loss on investment properties |  | $ | 57 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 57 |
Impairment loss on intangible assets |  | $ | — |  |  | $ | 9 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 9 |
Impairment loss on other assets |  | $ | 13 |  |  | $ | — |  |  | $ | 13 |  |  | $ | — |  |  | $ | 18 |  |  | $ | 44 |
For the year ended December 31, 2020
|  | Domestic Fixed Communi- cations Business |  |  | Mobile Communi- cations Business |  |  | Internet Business |  |  | International Fixed Communi- cations Business |  |  | Others |  |  | Total |
|  | NT$ |  |  | NT$ |  |  | NT$ |  |  | NT$ |  |  | NT$ |  |  | NT$ |
|  | (In Millions) |
Share of profits of associates and joint ventures accounted for using equity method |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 244 |  |  | $ | 244 |
Interest income |  | $ | 13 |  |  | $ | 5 |  |  | $ | 17 |  |  | $ | 22 |  |  | $ | 59 |  |  | $ | 116 |
Interest expenses |  | $ | 6 |  |  | $ | 56 |  |  | $ | 1 |  |  | $ | 10 |  |  | $ | 133 |  |  | $ | 206 |
Operating costs and expenses |  | $ | 59,371 |  |  | $ | 69,211 |  |  | $ | 15,241 |  |  | $ | 8,573 |  |  | $ | 14,447 |  |  | $ | 166,843 |
Depreciation and amortization |  | $ | 14,250 |  |  | $ | 17,800 |  |  | $ | 2,669 |  |  | $ | 1,450 |  |  | $ | 969 |  |  | $ | 37,138 |
Capital expenditure |  | $ | 11,483 |  |  | $ | 8,827 |  |  | $ | 1,397 |  |  | $ | 779 |  |  | $ | 1,025 |  |  | $ | 23,511 |
Gain (loss) on disposal of property, plant and equipment |  | $ | 1,442 |  |  | $ | (3 | ) |  | $ | — |  |  | $ | — |  |  | $ | (11 | ) |  | $ | 1,428 |
Gain on disposal of investment properties |  | $ | 151 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 151 |
Reversal of impairment loss on investment properties |  | $ | 27 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 27 |
Impairment loss on intangible assets |  | $ | — |  |  | $ | 9 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 9 |
Main Products and Service Revenues | The following is an analysis of the Company’s revenue from its major products and services.
|  | Year Ended December 31 |
|  | 2018 |  |  | 2019 |  |  | 2020 |
|  | NT$ |  |  | NT$ |  |  | NT$ |
|  | (In Millions) |
Mobile services revenue |  | $ | 63,906 |  |  | $ | 58,703 |  |  | $ | 56,724 |
Sales of products |  |  | 41,289 |  |  |  | 41,593 |  |  |  | 39,391 |
Local telephone and domestic long distance telephone services revenue |  |  | 29,996 |  |  |  | 27,929 |  |  |  | 26,475 |
Broadband access and domestic leased line services revenue |  |  | 22,453 |  |  |  | 22,116 |  |  |  | 22,420 |
Data communications internet services revenue |  |  | 21,137 |  |  |  | 21,003 |  |  |  | 21,447 |
International network and leased line services revenue |  |  | 8,724 |  |  |  | 7,066 |  |  |  | 3,884 |
Others |  |  | 27,978 |  |  |  | 29,110 |  |  |  | 37,268 |
|  | $ | 215,483 |  |  | $ | 207,520 |  |  | $ | 207,609 |
Geographic Information | The geographic information for revenues was as follows:
|  | Year Ended December 31 |
|  | 2018 |  |  | 2019 |  |  | 2020 |
|  | NT$ |  |  | NT$ |  |  | NT$ |
|  | (In Millions) |
Taiwan, ROC |  | $ | 205,696 |  |  | $ | 197,895 |  |  | $ | 200,881 |
Overseas |  |  | 9,787 |  |  |  | 9,625 |  |  |  | 6,728 |
|  | $ | 215,483 |  |  | $ | 207,520 |  |  | $ | 207,609 |

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