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Financial - risk management objectives and policies - Aging of financial liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Disclosure of financial risk management objectives and policies [line items] |  |
Hedge derivative financial instruments, undiscounted cash flows | $ 18,439 |
Non-derivative financial instruments, undiscounted cash flows | 879,787 | $ 870,915
Financial liabilities, undiscounted contractual payments | 879,787 | 870,915
Less than 1 year |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Hedge derivative financial instruments, undiscounted cash flows | 15,804 |
Non-derivative financial instruments, undiscounted cash flows | 290,743 | 496,006
Financial liabilities, undiscounted contractual payments | 290,743 | 496,006
Between 1 to 2 years |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Hedge derivative financial instruments, undiscounted cash flows | 2,635 |
Non-derivative financial instruments, undiscounted cash flows | 194,009 | 145,086
Financial liabilities, undiscounted contractual payments | 194,009 | 145,086
Between 2 and 5 years |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Hedge derivative financial instruments, undiscounted cash flows | 0 |
Non-derivative financial instruments, undiscounted cash flows | 352,015 | 144,640
Financial liabilities, undiscounted contractual payments | 352,015 | 144,640
More than 5 years |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Hedge derivative financial instruments, undiscounted cash flows | 0 |
Non-derivative financial instruments, undiscounted cash flows | 43,020 | 85,183
Financial liabilities, undiscounted contractual payments | 43,020 | 85,183
Bank Loans Capital [Member] |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Non-derivative financial instruments, undiscounted cash flows | 65,793 | 55,000
Financial liabilities, undiscounted contractual payments | 65,793 | 55,000
Bank Loans Capital [Member] | Less than 1 year |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Non-derivative financial instruments, undiscounted cash flows | 65,793 | 55,000
Financial liabilities, undiscounted contractual payments | 65,793 | 55,000
Bank Loans Capital [Member] | Between 1 to 2 years |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Non-derivative financial instruments, undiscounted cash flows | 0 | 0
Financial liabilities, undiscounted contractual payments | 0 | 0
Bank Loans Capital [Member] | Between 2 and 5 years |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Non-derivative financial instruments, undiscounted cash flows | 0 | 0
Financial liabilities, undiscounted contractual payments | 0 | 0
Bank Loans Capital [Member] | More than 5 years |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Non-derivative financial instruments, undiscounted cash flows | 0 | 0
Financial liabilities, undiscounted contractual payments | 0 | 0
Bank Loans Interest [Member] |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Non-derivative financial instruments, undiscounted cash flows | 1,156 | 486
Financial liabilities, undiscounted contractual payments | 1,156 | 486
Bank Loans Interest [Member] | Less than 1 year |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Non-derivative financial instruments, undiscounted cash flows | 1,156 | 486
Financial liabilities, undiscounted contractual payments | 1,156 | 486
Bank Loans Interest [Member] | Between 1 to 2 years |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Non-derivative financial instruments, undiscounted cash flows | 0 | 0
Financial liabilities, undiscounted contractual payments | 0 | 0
Bank Loans Interest [Member] | Between 2 and 5 years |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Non-derivative financial instruments, undiscounted cash flows | 0 | 0
Financial liabilities, undiscounted contractual payments | 0 | 0
Bank Loans Interest [Member] | More than 5 years |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Non-derivative financial instruments, undiscounted cash flows | 0 | 0
Financial liabilities, undiscounted contractual payments | 0 | 0
Trade and other payables [Member] |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Non-derivative financial instruments, undiscounted cash flows | 167,852 | 152,686
Financial liabilities, undiscounted contractual payments | 167,852 | 152,686
Trade and other payables [Member] | Less than 1 year |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Non-derivative financial instruments, undiscounted cash flows | 167,852 | 152,070
Financial liabilities, undiscounted contractual payments | 167,852 | 152,070
Trade and other payables [Member] | Between 1 to 2 years |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Non-derivative financial instruments, undiscounted cash flows | 0 | 616
Financial liabilities, undiscounted contractual payments | 0 | 616
Trade and other payables [Member] | Between 2 and 5 years |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Non-derivative financial instruments, undiscounted cash flows | 0 | 0
Financial liabilities, undiscounted contractual payments | 0 | 0
Trade and other payables [Member] | More than 5 years |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Non-derivative financial instruments, undiscounted cash flows | 0 | 0
Financial liabilities, undiscounted contractual payments | 0 | 0
Financial Obligation Capital [Member] |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Non-derivative financial instruments, undiscounted cash flows | 528,405 | 567,398
Financial liabilities, undiscounted contractual payments | 528,405 | 567,398
Financial Obligation Capital [Member] | Less than 1 year |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Non-derivative financial instruments, undiscounted cash flows | 21,587 | 262,088
Financial liabilities, undiscounted contractual payments | 21,587 | 262,088
Financial Obligation Capital [Member] | Between 1 to 2 years |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Non-derivative financial instruments, undiscounted cash flows | 175,932 | 131,588
Financial liabilities, undiscounted contractual payments | 175,932 | 131,588
Financial Obligation Capital [Member] | Between 2 and 5 years |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Non-derivative financial instruments, undiscounted cash flows | 324,815 | 125,154
Financial liabilities, undiscounted contractual payments | 324,815 | 125,154
Financial Obligation Capital [Member] | More than 5 years |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Non-derivative financial instruments, undiscounted cash flows | 6,071 | 48,568
Financial liabilities, undiscounted contractual payments | 6,071 | 48,568
Financial Obligation Interest [Member] |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Non-derivative financial instruments, undiscounted cash flows | 43,271 | 47,151
Financial liabilities, undiscounted contractual payments | 43,271 | 47,151
Financial Obligation Interest [Member] | Less than 1 year |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Non-derivative financial instruments, undiscounted cash flows | 14,868 | 22,597
Financial liabilities, undiscounted contractual payments | 14,868 | 22,597
Financial Obligation Interest [Member] | Between 1 to 2 years |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Non-derivative financial instruments, undiscounted cash flows | 13,289 | 11,225
Financial liabilities, undiscounted contractual payments | 13,289 | 11,225
Financial Obligation Interest [Member] | Between 2 and 5 years |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Non-derivative financial instruments, undiscounted cash flows | 14,911 | 11,880
Financial liabilities, undiscounted contractual payments | 14,911 | 11,880
Financial Obligation Interest [Member] | More than 5 years |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Non-derivative financial instruments, undiscounted cash flows | 203 | 1,449
Financial liabilities, undiscounted contractual payments | 203 | 1,449
Lease Capital [Member] |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Non-derivative financial instruments, undiscounted cash flows | 7,839 | 7,503
Financial liabilities, undiscounted contractual payments | 7,839 | 7,503
Lease Capital [Member] | Less than 1 year |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Non-derivative financial instruments, undiscounted cash flows | 3,609 | 3,692
Financial liabilities, undiscounted contractual payments | 3,609 | 3,692
Lease Capital [Member] | Between 1 to 2 years |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Non-derivative financial instruments, undiscounted cash flows | 2,010 | 1,514
Financial liabilities, undiscounted contractual payments | 2,010 | 1,514
Lease Capital [Member] | Between 2 and 5 years |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Non-derivative financial instruments, undiscounted cash flows | 2,220 | 2,297
Financial liabilities, undiscounted contractual payments | 2,220 | 2,297
Lease Capital [Member] | More than 5 years |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Non-derivative financial instruments, undiscounted cash flows | 0 | 0
Financial liabilities, undiscounted contractual payments | 0 | 0
Lease Interest [Member] |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Non-derivative financial instruments, undiscounted cash flows | 362 | 620
Financial liabilities, undiscounted contractual payments | 362 | 620
Lease Interest [Member] | Less than 1 year |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Non-derivative financial instruments, undiscounted cash flows | 74 | 73
Financial liabilities, undiscounted contractual payments | 74 | 73
Lease Interest [Member] | Between 1 to 2 years |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Non-derivative financial instruments, undiscounted cash flows | 143 | 143
Financial liabilities, undiscounted contractual payments | 143 | 143
Lease Interest [Member] | Between 2 and 5 years |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Non-derivative financial instruments, undiscounted cash flows | 145 | 404
Financial liabilities, undiscounted contractual payments | 145 | 404
Lease Interest [Member] | More than 5 years |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Non-derivative financial instruments, undiscounted cash flows | 0 | 0
Financial liabilities, undiscounted contractual payments | 0 | 0
Contingent consideration liability [Member] |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Non-derivative financial instruments, undiscounted cash flows | 46,670 | 40,071
Financial liabilities, undiscounted contractual payments | 46,670 | 40,071
Contingent consideration liability [Member] | Less than 1 year |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Non-derivative financial instruments, undiscounted cash flows | 0 | 0
Financial liabilities, undiscounted contractual payments | 0 | 0
Contingent consideration liability [Member] | Between 1 to 2 years |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Non-derivative financial instruments, undiscounted cash flows | 0 | 0
Financial liabilities, undiscounted contractual payments | 0 | 0
Contingent consideration liability [Member] | Between 2 and 5 years |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Non-derivative financial instruments, undiscounted cash flows | 9,924 | 4,905
Financial liabilities, undiscounted contractual payments | 9,924 | 4,905
Contingent consideration liability [Member] | More than 5 years |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Non-derivative financial instruments, undiscounted cash flows | 36,746 | 35,166
Financial liabilities, undiscounted contractual payments | 36,746 | 35,166
Minera Yanacocha SRL and subsidiary [Member] |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Total | 103,104 | 101,620
Minera Yanacocha SRL and subsidiary [Member] | Less than 1 year |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Total | 57,641 | 57,388
Minera Yanacocha SRL and subsidiary [Member] | Between 1 to 2 years |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Total | 40 | 305
Minera Yanacocha SRL and subsidiary [Member] | Between 2 and 5 years |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Total | 45,423 | 43,927
Minera Yanacocha SRL and subsidiary [Member] | Trade accounts payable - domestic suppliers |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Total | 44,977 | 45,671
Minera Yanacocha SRL and subsidiary [Member] | Trade accounts payable - domestic suppliers | Less than 1 year |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Total | 44,977 | 45,671
Minera Yanacocha SRL and subsidiary [Member] | Debt instruments |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Total | 45,423 | 43,927
Minera Yanacocha SRL and subsidiary [Member] | Debt instruments | Between 2 and 5 years |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Total | 45,423 | 43,927
Minera Yanacocha SRL and subsidiary [Member] | Trade accounts payable - Related parties |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Total | 12,374 | 11,426
Minera Yanacocha SRL and subsidiary [Member] | Trade accounts payable - Related parties | Less than 1 year |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Total | 12,374 | 11,426
Minera Yanacocha SRL and subsidiary [Member] | Lease liabilities |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Total | 330 | 596
Minera Yanacocha SRL and subsidiary [Member] | Lease liabilities | Less than 1 year |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Total | 290 | 291
Minera Yanacocha SRL and subsidiary [Member] | Lease liabilities | Between 1 to 2 years |  |
Disclosure of financial risk management objectives and policies [line items] |  |
Total | $ 40 | $ 305

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