Name:	ifrs-full_DisclosureOfSignificantInvestmentsInAssociatesLineItems
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

The percentage of voting equity interests acquired in a business combination. [Refer: Business combinations [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 3
-IssueDate 2018-01-01
-Paragraph B64
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=3&date=2018-03-01&anchor=para_B64_c&doctype=Appendix&seq=2
-URIDate 2018-03-16

Name:	ifrs-full_PercentageOfVotingEquityInterestsAcquired
Namespace Prefix:	ifrs-full_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

The minimum holding percentage by the holder after the transfer of shares that will require consent to transfer.

No definition available.

Name:	ken_ConsentToTransferMinimumHoldingPercentage
Namespace Prefix:	ken_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

The minimum shareholder interest imposed by the transferability restrictions in the associate agreement.

No definition available.

Name:	ken_EquityInterestTransferMinimumShareholderInterest
Namespace Prefix:	ken_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

The minimum holding percentage by the holder after the transfer of shares that will require prior notice.

No definition available.