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Financial risk management (Tables) | 12 Months Ended
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Dec. 31, 2021
Disclosure Of Financial Risk Management Explanatory [Abstract] |
Disclosure of credit risk exposure [text block] | The credit quality of financial assets that are not past due or impaired can be evaluated by reference to external credit ratings (if they are available) or historical information on counterparty late payment rates:
Financial institution |  | Financial assets |  | Rating |  | As of December 31, 2021 |
|  |  |  | Moody´s |  | S&P |  | Fitch |  | ThUS$ |
Banco crédito e Inversiones |  | Time deposits |  | P-1 |  | A-2 |  | F2- |  |  | 9,752 |
Banco Itaú Corpbanca |  | Time deposits |  | P-2 |  | A-2 |  | - |  |  | 8,001 |
Banco Santander – Santiago |  | Time deposits |  | P-1 |  | A-2 |  | - |  |  | 9,052 |
Scotiabank Sud Americano |  | Time deposits |  | P-1 |  | A-1 |  | F1+ |  |  | 10,750 |
Other banks |  | Time deposits |  | - |  | - |  | F1+ |  |  | 200,100 |
JP Morgan US dollar Liquidity Fund Institutional |  | Investment fund |  | Aaa-mf |  | AAAm |  | AAAmmf |  |  | 381,297 |
Legg Mason - Western Asset Institutional cash reserves |  | Investment fund |  | - |  | AAAm |  | AAAmmf |  |  | 233,648 |
Total |  |  |  |  |  |  |  |  |  |  | 852,600 |
| F-46 |
Notes to the Consolidated Financial Statements December 31, 2021 |  |
Financial institution |  | Financial assets |  | Rating |  | As of December 31, 2021 |
|  |  |  | Moody´s |  | S&P |  | Fitch |  | ThUS$ |
Bancocrédito e Inversiones |  | Time deposits |  | P-1 |  | A-2 |  | - |  |  | 34,325 |
Banco Itaú Corpbanca |  | Time deposits |  | P-2 |  | A-2 |  | - |  |  | 195,471 |
Banco Santander – Santiago |  | Time deposits |  | P-1 |  | A-2 |  | - |  |  | 65,899 |
Scotiabank Sud Americano |  | Time deposits |  | P-1 |  | A-1 |  | F1+ |  |  | 289,421 |
Sumitomo Mitsui Banking |  | Time deposits |  | P-1 |  | - |  | F1 |  |  | 320,054 |
Total |  |  |  |  |  |  |  |  |  |  | 905,170 |
Financial institution |  | Financial assets |  | Rating |  | As of December 31, 2020 |
|  |  |  | Moody´s |  | S&P |  | Fitch |  | ThUS$ |
Banco créditoe Inversiones |  | Time deposits |  | P-1 |  | A-1 |  | - |  |  | 9,002 |
Banco de Chile |  | Time deposits |  | P-1 |  | A-1 |  | - |  |  | 10,503 |
Banco Estado |  | Time deposits |  | P-1 |  | A-1 |  | - |  |  | 1,001 |
Banco Itaú Corpbanca |  | Time deposits |  | P-2 |  | A-2 |  | - |  |  | 7,299 |
Banco Santander – Santiago |  | Time deposits |  | P-1 |  | A-1 |  | - |  |  | 16,702 |
Scotiabank Sud Americano |  | Time deposits |  | - |  | - |  | F1+ |  |  | 7,002 |
JP Morgan US dollar Liquidity Fund Institutional |  | Investment fund |  | Aaa-mf |  | AAAm |  | AAAmmf |  |  | 102,753 |
Legg Mason - Western Asset Institutional cash reserves |  | Investment fund |  | - |  | AAAm |  | AAAmmf |  |  | 107,625 |
Other banks with lower balances |  | Time deposits |  | - |  | - |  | - |  |  | 86 |
Total |  |  |  |  |  |  |  |  |  |  | 261,973 |
Financial institution |  | Financial assets |  | Rating |  | As of December 31, 2020 |
|  |  |  | Moody´s |  | S&P |  | Fitch |  | ThUS$ |
Banco de crédito e Inversiones |  | Time deposits |  | P-1 |  | A-1 |  | - |  |  | 185,589 |
Banco Itaú Corpbanca |  | Time deposits |  | P-2 |  | A-2 |  | - |  |  | 49,006 |
Banco Santander – Santiago |  | Time deposits |  | P-1 |  | A-1 |  | - |  |  | 45,168 |
Banco Scotiabank Sud Americano |  | Time deposits |  | - |  | - |  | F1+ |  |  | 31,668 |
JP Morgan Asset Management |  | Investment fund |  | P-1 |  | A-1 |  | N1+ |  |  | 34,028 |
Total |  |  |  |  |  |  |  |  |  |  | 345,459 |
Financial institution |  | Financial assets |  | Rating |  | As of December 31, 2021 |
|  |  |  | Moody´s |  | S&P |  | Fitch |  | ThUS$ |
Agricultural Bank of China |  | Bank notes |  | + |  | - |  | - |  |  | 860 |
Bank of China Limited |  | Bank notes |  | + |  | - |  | - |  |  | 4,167 |
Bank of Communications |  | Bank notes |  | + |  | - |  | - |  |  | 7,422 |
China CITIC Bank Corp Ltd |  | Bank notes |  | ++ |  | - |  | - |  |  | 2,623 |
China Construction Bank Corporation |  | Bank notes |  | + |  | - |  | - |  |  | 7,122 |
China Everbright Bank Co. Ltd |  | Bank notes |  | ++ |  | - |  | - |  |  | 6,569 |
China Merchants Bank |  | Bank notes |  | + |  | - |  | - |  |  | 22,628 |
China Minsheng Bank Corporation |  | Bank notes |  | - |  | - |  | ++ |  |  | 784 |
Industrial & Commercial Bank of China Limited |  | Bank notes |  | + |  | - |  | - |  |  | 353 |
Industrial Bank |  | Bank notes |  | + |  | - |  | - |  |  | 6,615 |
Ping An Bank |  | Bank notes |  | ++ |  | - |  | - |  |  | 8,391 |
Shanghai Pudong Development Bank Co. Ltd |  | Bank notes |  | ++ |  | - |  | - |  |  | 7,905 |
China Development Bank |  | Bank notes |  | - |  | - |  | + |  |  | 16,807 |
Postal Savings Bank of China |  | Bank notes |  | - |  | + |  | - |  |  | 4,718 |
KEB Hana Bank (China) |  | Bank notes |  | + |  | - |  | - |  |  | 1,121 |
Total |  |  |  |  |  |  |  |  |  |  | 98,085 |
(+) Good credit rating (++) Satisfactory credit rating
Disclosure of cash and cash equivalents of cashflows [Text Block] | The position in other cash and cash equivalents are invested in highly liquid mutual funds with an AAA risk rating.
|  | Nature of undiscounted cash flows |
As of December 31, 2021 (figures expressed in millions of US dollars) |  | Carrying amount |  |  | Less than 1 year |  |  | 1 to 5 years |  |  | Over 5 years |  |  | Total |
Bank borrowings |  |  | 70.08 |  |  |  | 1.05 |  |  |  | 70.64 |  |  |  | - |  |  |  | 71.69 |
Unsecured obligations |  |  | 2,518.64 |  |  |  | 108.06 |  |  |  | 924.03 |  |  |  | 2,980.91 |  |  |  | 4,013.00 |
Sub total |  |  | 2,588.72 |  |  |  | 109.11 |  |  |  | 994.67 |  |  |  | 2,980.91 |  |  |  | 4,084.69 |
Hedging liabilities |  |  | 85.25 |  |  |  | 12.38 |  |  |  | 31.58 |  |  |  | 39.70 |  |  |  | 83.66 |
Derivative financial instruments |  |  | 1.67 |  |  |  | 1.67 |  |  |  | - |  |  |  | - |  |  |  | 1.67 |
Sub total |  |  | 86.92 |  |  |  | 14.05 |  |  |  | 31.58 |  |  |  | 39.70 |  |  |  | 85.33 |
Current and non-current lease liabilities |  |  | 54.22 |  |  |  | 8.88 |  |  |  | 30.97 |  |  |  | 29.08 |  |  |  | 68,93 |
Trade accounts payable and other accounts payable |  |  | 279.65 |  |  |  | 279.65 |  |  |  | - |  |  |  | - |  |  |  | 279.65 |
Total |  |  | 3,009.51 |  |  |  | 411.69 |  |  |  | 1,057.22 |  |  |  | 3,049.69 |  |  |  | 4,518.60 |
|  | Nature of undiscounted cash flows |
As of December 31, 2020 (figures expressed in millions of US dollars) |  | Carrying amount |  |  | Less than 1 year |  |  | 1 to 5 years |  |  | Over 5 years |  |  | Total |
Bank borrowings |  |  | 70.08 |  |  |  | 0.94 |  |  |  | 71.40 |  |  |  | - |  |  |  | 72.34 |
Unsecured obligations |  |  | 1,872.09 |  |  |  | 88.22 |  |  |  | 927.17 |  |  |  | 1,727.14 |  |  |  | 2,742.53 |
Sub total |  |  | 1,942.17 |  |  |  | 89.16 |  |  |  | 998.57 |  |  |  | 1,727.14 |  |  |  | 2,814.87 |
Hedging liabilities |  |  | 40.21 |  |  |  | 6.06 |  |  |  | 12.34 |  |  |  | 11.07 |  |  |  | 29.47 |
Derivative financial instruments |  |  | 5.39 |  |  |  | 5.39 |  |  |  | - |  |  |  | - |  |  |  | 5.39 |
Sub total |  |  | 45.60 |  |  |  | 11.45 |  |  |  | 12.34 |  |  |  | 11.07 |  |  |  | 34.86 |
Current and non-current lease liabilities |  |  | 31.07 |  |  |  | 6.40 |  |  |  | 21.04 |  |  |  | 7.17 |  |  |  | 34.61 |
Trade accounts payable and other accounts payable |  |  | 203.93 |  |  |  | 203.93 |  |  |  | - |  |  |  | - |  |  |  | 203.93 |
Total |  |  | 2,222.77 |  |  |  | 310.94 |  |  |  | 1,031.95 |  |  |  | 1,745.38 |  |  |  | 3,088.27 |
Disclosure of derivative contracts of asset [text block] | These derivative contracts are held with domestic and foreign banks, which have the following credit ratings.
Financial institution |  | Financial assets |  | Rating
|  |  |  | Moody´s |  | S&P |  | Fitch
Banco Estado |  | Derivative |  | P-1 |  | A-1 |  | -
Merrill Lynch International |  | Derivative |  | - |  | A+ |  | AA
Banco Itaú-Corpbanca |  | Derivative |  | P-2 |  | A-2 |  | -
JP Morgan |  | Derivative |  | Aa2 |  | A+ |  | AA
Morgan Stanley |  | Derivative |  | A+ |  | BBB+ |  | A
The Bank of Nova Scotia |  | Derivative |  | A |  | A- |  | AA-

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