XML 180 R166.htm IDEA: XBRL DOCUMENT
v3.19.1

Shareholders' equity, net (Details) S/ in Thousands, $ in Thousands | Dec. 31, 2018 USD ($) shares | Dec. 31, 2018 PEN (S/) shares | Dec. 31, 2017 USD ($)
--- | --- | --- | ---
Disclosure of Shareholders' equity, net [Line Items] |  |  |
Capital stock | $ | $ 750,497 |  | $ 750,497
Common shares [member] |  |  |
Disclosure of Shareholders' equity, net [Line Items] |  |  |
Number of shares | 274,889,924 | 274,889,924 |
Capital stock | $ 813,162 | S/ 2,748,899 |
Treasury shares [member] |  |  |
Disclosure of Shareholders' equity, net [Line Items] |  |  |
Number of shares | (21,174,734) | (21,174,734) |
Capital stock | $ (62,665) | S/ (211,747) |
Total Shares [Member] |  |  |
Disclosure of Shareholders' equity, net [Line Items] |  |  |
Number of shares | 253,715,190 | 253,715,190 |
Capital stock | $ 750,497 | S/ 2,537,152 |

X
- References No definition available. + Details
Name: | cik0001013131_DisclosureOfShareholdersEquityNetLineItems
Namespace Prefix: | cik0001013131_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The nominal value of capital issued. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 78 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_78_e&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_IssuedCapital
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The number of shares that have been authorised and issued, reduced by treasury shares held. [Refer: Treasury shares] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 79 -Subparagraph a -Clause iv -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_79_a_iv&doctype=Standard -URIDate 2018-03-16 + Details
Name: | ifrs-full_NumberOfSharesOutstanding
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | ifrs-full_ClassesOfShareCapitalAxis=ifrs-full_OrdinarySharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfShareCapitalAxis=ifrs-full_TreasurySharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_ClassesOfShareCapitalAxis=cik0001013131_TotalSharesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |