Deferred Income Tax - Additional Information (Detail) S/ in Millions	Dec. 31, 2017 PEN (S/)
Disclosure of deferred income taxes [Line Items]
Tax losses	S/ 494.8
Later than one year [member]
Disclosure of deferred income taxes [Line Items]
Tax losses	83.9
From 1 to 2 years [member]
Disclosure of deferred income taxes [Line Items]
Tax losses	S/ 10.3

The amount of unused tax losses for which no deferred tax asset is recognised in the statement of financial position. [Refer: Unused tax losses [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 12
-IssueDate 2017-01-01
-Paragraph 81
-Subparagraph e
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=12&date=2017-03-01&anchor=para_81_e&doctype=Standard
-URIDate 2017-03-09

Name:	ifrs-full_UnusedTaxLossesForWhichNoDeferredTaxAssetRecognised
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	na
Period Type:	instant