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Provisions (Tables) | 12 Months Ended
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Dec. 31, 2018
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Summary of Provisions | The Company’s current provisions were provisions for sales returns and allowances.
|  | Sales Returns and Allowances |
|  | NT$ (In Millions) |
Year Ended December 31, 2016 |  |  |  |
Balance, beginning of year |  | $ | 10,163.5 |
Provision |  |  | 36,519.3 |
Payment |  |  | (28,569.3 | )
Effect of exchange rate changes |  |  | (75.7 | )
Balance, end of year |  | $ | 18,037.8 |
|  | Sales Returns and Allowances |
|  | NT$ (In Millions) |
Year Ended December 31, 2017 |  |  |  |
Balance, beginning of year |  | $ | 18,037.8 |
Provision |  |  | 44,833.6 |
Payment |  |  | (48,884.7 | )
Effect of exchange rate changes |  |  | (24.9 | )
Balance, end of year |  | $ | 13,961.8 |

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