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Short-term Loans and Bonds Payable (Tables) | 12 Months Ended
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Dec. 31, 2019
Short-term loans [member] |
Statement [LineItems] |
Summary of Short-term Loans and Bonds Payable |
|  | December 31, 2018 |  |  | December 31, 2019 |
|  | NT$ |  |  | NT$ |
|  | (In Millions) |  |  | (In Millions) |
Unsecured loan s |  |  |  |  |  |  |  |
Amount |  | $ | 88,754.7 |  |  | $ | 118,522.3 |
Original loan content |  |  |  |  |  |  |  |
US$ (in millions) |  | $ | 2,610.0 |  |  | $ | 2,370.0 |
EUR (in millions) |  |  | 242.0 |  |  |  | 1,410.0 |
Annual interest rate |  |  | 0.01%-3.22 | % |  |  | 0.01%-2.22 | %
Maturity date |  |  | Due by January 2019 |  |  |  | Due by May 2020 |
Bonds payable [member] |
Statement [LineItems] |
Summary of Short-term Loans and Bonds Payable |
|  | December 31, 2018 |  |  | December 31, 2019 |
|  | NT$ |  |  | NT$ |
|  | (In Millions) |  |  | (In Millions) |
Domestic unsecured bond s |  | $ | 91,800.0 |  |  | $ | 56,900.0 |
Less: Current portion |  |  | (34,900.0 | ) |  |  | (31,800.0 | )
|  | $ | 56,900.0 |  |  | $ | 25,100.0 |
Bonds payable [member] | Taiwan [member] |
Statement [LineItems] |
Summary of Short-term Loans and Bonds Payable | The major terms of domestic unsecured bonds are as follows:
|  |  |  |  |  | Total Amount |  |  |  |  |  |
|  |  |  |  |  | NT$ |  |  | Coupon |  |  | Repayment and
Issuance |  | Tranche |  | Issuance Period |  | (In Millions) |  |  | Rate |  |  | Interest Payment
100-1 |  | B |  | September 2011 to September 2018 |  | $ | 7,500.0 |  |  |  | 1.63 | % |  | Bullet repayment; interest payable annually
100-2 |  | B |  | January 2012 to January 2019 |  |  | 7,000.0 |  |  |  | 1.46 | % |  | The same as above
101-1 |  | B |  | August 2012 to August 2019 |  |  | 9,000.0 |  |  |  | 1.40 | % |  | The same as above
101-2 |  | B |  | September 2012 to September 2019 |  |  | 9,000.0 |  |  |  | 1.39 | % |  | The same as above
101-3 |  | — |  | October 2012 to October 2022 |  |  | 4,400.0 |  |  |  | 1.53 | % |  | The same as above
101-4 |  | A |  | January 2013 to January 2018 |  |  | 10,600.0 |  |  |  | 1.23 | % |  | The same as above
|  | B |  | January 2013 to January 2020 |  |  | 10,000.0 |  |  |  | 1.35 | % |  | The same as above
|  | C |  | January 2013 to January 2023 |  |  | 3,000.0 |  |  |  | 1.49 | % |  | The same as above
102-1 |  | A |  | February 2013 to February 2018 |  |  | 6,200.0 |  |  |  | 1.23 | % |  | The same as above
|  | B |  | February 2013 to February 2020 |  |  | 11,600.0 |  |  |  | 1.38 | % |  | The same as above
|  | C |  | February 2013 to February 2023 |  |  | 3,600.0 |  |  |  | 1.50 | % |  | The same as above
102-2 |  | A |  | July 2013 to July 2020 |  |  | 10,200.0 |  |  |  | 1.50 | % |  | The same as above
|  | B |  | July 2013 to July 2023 |  |  | 3,500.0 |  |  |  | 1.70 | % |  | The same as above
102-3 |  | B |  | August 2013 to August 2019 |  |  | 8,500.0 |  |  |  | 1.52 | % |  | The same as above
102-4 |  | C |  | September 2013 to March 2019 |  |  | 1,400.0 |  |  |  | 1.60 | % |  | Bullet repayment; interest payable annually (interest for the six months prior to maturity will accrue on the basis of actual days and be repayable at maturity)
|  | D |  | September 2013 to March 2021 |  |  | 2,600.0 |  |  |  | 1.85 | % |  | The same as above
|  | E |  | September 2013 to March 2023 |  |  | 5,400.0 |  |  |  | 2.05 | % |  | The same as above
|  | F |  | September 2013 to September 2023 |  |  | 2,600.0 |  |  |  | 2.10 | % |  | Bullet repayment; interest payable annually
Bonds payable [member] | Overseas [member] |
Statement [LineItems] |
Summary of Short-term Loans and Bonds Payable | The major terms of overseas unsecured bonds are as follows:
Issuance Period |  | Total Amount US$ (In Millions) |  |  | Coupon Rate |  | Repayment and Interest Payment
April 2013 to April 201 8 |  | $ | 1,150.0 |  |  | 1.625% |  | Bullet repayment; interest payable semi-annually

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