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Transactions with related companies - Related income taxes assumed (Details) - Minera Yanacocha SRL and subsidiary [Member] - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
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Balance receivable from related parties [Abstract] |  |
Amounts receivable, related party transactions | $ 2,300 | $ 598
Balance payable to related parties [Abstract] |  |
Amounts payable, related party transactions | 12,374 | 11,426
S.M.R.L. Chaupiloma Dos de Cajamarca c [Member] |  |
Balance payable to related parties [Abstract] |  |
Amounts payable, related party transactions | 4,596 | 4,863
NVL, USA Limited, Delaware [Member] |  |
Balance receivable from related parties [Abstract] |  |
Amounts receivable, related party transactions | 156 | 102
Newmont USA Limited [Member] |  |
Balance receivable from related parties [Abstract] |  |
Amounts receivable, related party transactions | 435 | 144
Balance payable to related parties [Abstract] |  |
Amounts payable, related party transactions | 2,366 | 1,034
Oroplata S.A. |  |
Balance receivable from related parties [Abstract] |  |
Amounts receivable, related party transactions | 254 | 0
Newmont International Service Limited [Member] |  |
Balance receivable from related parties [Abstract] |  |
Amounts receivable, related party transactions | 1,431 | 168
Balance payable to related parties [Abstract] |  |
Amounts payable, related party transactions | 4,227 | 3,297
Suriname Gold Company [Member] |  |
Balance receivable from related parties [Abstract] |  |
Amounts receivable, related party transactions | 0 | 135
Newmont Global Employment Limited [Member] |  |
Balance receivable from related parties [Abstract] |  |
Amounts receivable, related party transactions | 5 | 20
Newmont Peru S.R.L [Member] |  |
Balance receivable from related parties [Abstract] |  |
Amounts receivable, related party transactions | 22 | 26
Balance payable to related parties [Abstract] |  |
Amounts payable, related party transactions | 1,033 | 1,101
Newmont Technologies Limited [Member] |  |
Balance payable to related parties [Abstract] |  |
Amounts payable, related party transactions | 142 | 1,042
Newmont USA Limited Carlin [Member] |  |
Balance payable to related parties [Abstract] |  |
Amounts payable, related party transactions | 0 | 3
Others [Member] |  |
Balance receivable from related parties [Abstract] |  |
Amounts receivable, related party transactions | (3) | 3
Balance payable to related parties [Abstract] |  |
Amounts payable, related party transactions | $ 10 | $ 86

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