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Revenue (Tables) | 12 Months Ended
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Dec. 31, 2023
Revenue [abstract] |
Summary of Revenue |
|  | Year Ended December 31 |
|  | 2021 |  |  | 2022 |  |  | 2023 |
|  | NT$ |  |  | NT$ |  |  | NT$ |
|  | (In Millions) |
Revenue from contracts with customers |  | $ | 208,412 |  |  | $ | 214,498 |  |  | $ | 220,190 |
Other revenues |  |  |  |  |  |  |  |  |
Government grants income |  |  | 1,037 |  |  |  | 1,030 |  |  |  | 1,704 |
Rental income |  |  | 864 |  |  |  | 1,022 |  |  |  | 1,120 |
Others |  |  | 165 |  |  |  | 189 |  |  |  | 185 |
|  |  | 2,066 |  |  |  | 2,241 |  |  |  | 3,009 |
Total |  | $ | 210,478 |  |  | $ | 216,739 |  |  | $ | 223,199 |
Summary of Contract Balances | b. Contract balances
|  | January 1, |  |  | December 31 |
|  | 2022 |  |  | 2022 |  |  | 2023 |
|  | NT$ |  |  | NT$ |  |  | NT$ |
|  | (In Millions) |
Trade notes and accounts receivable (Note 10) |  | $ | 23,947 |  |  | $ | 24,672 |  |  | $ | 24,842 |
Contract assets |  |  |  |  |  |  |  |  |
Products and service bundling |  | $ | 7,197 |  |  | $ | 7,956 |  |  | $ | 9,297 |
Others |  |  | 983 |  |  |  | 1,256 |  |  |  | 1,206 |
Less : Loss allowance |  |  | (18 | ) |  |  | (19 | ) |  |  | (21 | )
|  | $ | 8,162 |  |  | $ | 9,193 |  |  | $ | 10,482 |
Current |  | $ | 5,554 |  |  | $ | 6,056 |  |  | $ | 6,713 |
Noncurrent |  |  | 2,608 |  |  |  | 3,137 |  |  |  | 3,769 |
|  | $ | 8,162 |  |  | $ | 9,193 |  |  | $ | 10,482 |
Contract liabilities |  |  |  |  |  |  |  |  |
Telecommunications business |  | $ | 13,144 |  |  | $ | 14,081 |  |  | $ | 14,016 |
Project business |  |  | 5,435 |  |  |  | 6,586 |  |  |  | 6,654 |
Advance land receipts (Note 41) |  |  | — |  |  |  | — |  |  |  | 460 |
Others |  |  | 495 |  |  |  | 397 |  |  |  | 518 |
|  | $ | 19,074 |  |  | $ | 21,064 |  |  | $ | 21,648 |
Current |  | $ | 12,234 |  |  | $ | 13,390 |  |  | $ | 14,088 |
Noncurrent |  |  | 6,840 |  |  |  | 7,674 |  |  |  | 7,560 |
|  | $ | 19,074 |  |  | $ | 21,064 |  |  | $ | 21,648 |
Summary of Changes in Contract Assets and Contract Liabilities | Significant changes of contract assets and liabilities recognized resulting from product and service bundling were as follows:
|  | Year Ended December 31 |
|  | 2021 |  |  | 2022 |  |  | 2023 |
|  | NT$ |  |  | NT$ |  |  | NT$ |
|  | (In Millions) |
Contract assets |  |  |  |  |  |  |  |  |
Net increase of customer contracts |  | $ | 6,035 |  |  | $ | 6,933 |  |  | $ | 7,961 |
Reclassified to trade receivables |  |  | (6,039 | ) |  |  | (6,149 | ) |  |  | (6,574 | )
|  | $ | (4 | ) |  | $ | 784 |  |  | $ | 1,387 |
Contract liabilities |  |  |  |  |  |  |  |  |
Net increase of customer contracts |  | $ | — |  |  | $ | 9 |  |  | $ | 187 |
Recognized as revenues |  |  | (12 | ) |  |  | (5 | ) |  |  | (173 | )
|  | $ | (12 | ) |  | $ | 4 |  |  | $ | 14 |
Summary of Revenue Recognized | Revenue recognized for the year that was included in the contract liability at the beginning of the year was as follows:
|  | Year Ended December 31 |
|  | 2021 |  |  | 2022 |  |  | 2023 |
|  | NT$ |  |  | NT$ |  |  | NT$ |
|  | (In Millions) |
Telecommunications business |  | $ | 5,952 |  |  | $ | 6,626 |  |  | $ | 6,660 |
Project business |  |  | 4,630 |  |  |  | 4,067 |  |  |  | 5,290 |
Others |  |  | 431 |  |  |  | 440 |  |  |  | 540 |
|  | $ | 11,013 |  |  | $ | 11,133 |  |  | $ | 12,490 |
Summary of Incremental Costs of Obtaining Contracts | c. Incremental costs of obtaining contracts
|  | December 31 |
|  | 2022 |  |  | 2023 |
|  | NT$ |  |  | NT$ |
|  | (In Millions) |
Current |  |  |  |  |  |
Incremental costs of obtaining contracts |  | $ | — |  |  | $ | 211 |
Noncurrent |  |  |  |  |  |
Incremental costs of obtaining contracts |  | $ | 980 |  |  | $ | 939 |

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