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Cash Flows Information - Summary of Non-cash Investing Activities (Detail) $ in Thousands, $ in Thousands | 12 Months Ended
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Dec. 31, 2019 TWD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2018 TWD ($) | Dec. 31, 2017 TWD ($)
Payments for property, plant and equipment |  |  |  |
Purchase of property, plant and equipment | $ 63,073,887 | $ 2,108,789 | $ 39,092,238 | $ 23,677,682
Increase in other non-current assets | 68,560 | 2,292 | 402,255 | 90,560
Decrease (increase) in other payables | (6,254,579) | (209,113) | 1,942,259 | 982,260
Capitalized borrowing costs | (77,715) | (2,598) | (50,309) | (51,262)
Payments for property, plant and equipment | 56,810,153 | 1,899,370 | 41,386,443 | 24,699,240
Proceeds from disposal of property, plant and equipment |  |  |  |
Consideration from disposal of property, plant and equipment | 441,444 | 14,759 | 1,133,435 | 1,487,334
Decrease (increase) in other receivables | 7,495 | 251 | (5,791) | 876
Proceeds from disposal of property, plant and equipment | 448,939 | 15,010 | 1,127,644 | 1,488,210
Payments for investment properties |  |  |  |
Purchase of investment properties | 2,532 | 85 | 125,853 | 186,535
Capitalized borrowing costs |  |  | (89) | (13)
Proceeds from disposals of investment property | 2,532 | 85 | 125,764 | 186,522
Payments for other intangible assets |  |  |  |
Purchase of other intangible assets | 1,350,908 | 45,166 | 537,659 | 277,825
Decrease (increase) in other payables | 60,160 | 2,011 | 40,106 | 60,159
Purchase of intangible assets classified as investing activities | $ 1,411,068 | $ 47,177 | $ 577,765 | 337,984
Net cash inflow from disposal of subsidiaries |  |  |  |
Consideration from disposal of subsidiaries |  |  |  | 7,046,464
Increase in other payables |  |  |  | 3,552
Cash and cash equivalents disposed of |  |  |  | (29,133)
Net cash inflow from disposal of subsidiaries |  |  |  | $ 7,020,883

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