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Available-for-sale financial investments (Details) - PEN (S/) S/ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Movement In Available-For-Sale Financial Investments [Roll Forward]
Beginning balance	S/ 657	S/ 436
Fair value change recorded in other comprehensive income	37	221	S/ (308)
Ending balance	21,206	657	436
Financial Assets Available-for-Sale, Category [Member]
Movement In Available-For-Sale Financial Investments [Roll Forward]
Beginning balance	657	436	744
Investment shares from spin-off, note 1.1	21,206
Fair value change recorded in other comprehensive income	37	221	(308)
Disposals (c)	(694)
Ending balance	S/ 21,206	S/ 657	S/ 436

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- Definition

Refers to amount of investment shares from spinoff during the period.

+ References

No definition available.

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- References

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- Definition

The amounts removed from equity and adjusted against the fair value of financial assets on reclassification out of the fair value through other comprehensive income measurement category, net of tax. [Refer: Financial assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2018-01-01
-Name IFRS
-Number 9
-IssueDate 2017-01-01
-Paragraph 5.6.5
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=9&date=2017-03-01&anchor=para_5.6.5&doctype=Standard
-URIDate 2017-03-09

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- Definition

The fair value of financial assets. [Refer: At fair value [member]; Financial assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2017-01-01
-Paragraph 25
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-01&anchor=para_25&doctype=Standard
-URIDate 2017-03-09

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- Definition

The amount of other comprehensive income, net of tax, related to available-for-sale financial assets. [Refer: Financial assets available-for-sale; Other comprehensive income]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2018-01-01
-Name IAS
-Number 1
-IssueDate 2017-01-01
-Paragraph 91
-Subparagraph a
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-URIDate 2017-03-09

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2018-01-01
-Name IAS
-Number 1
-IssueDate 2017-01-01
-Paragraph 7
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-02&anchor=para_7&doctype=Standard&book=B
-URIDate 2017-03-09

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