Statement [Line Items]

No definition available.

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Namespace Prefix:	cel_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of profits includes share of non-controlling interests.

+ References

No definition available.

+ Details

Name:	cel_PercentageOfProfitsIncludesShareOfNoncontrollingInterests
Namespace Prefix:	cel_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The amount of additions to right-of-use assets. [Refer: Right-of-use assets]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2020-01-01
-Paragraph 53
-Subparagraph h
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2020-en-r&anchor=para_53_h&doctype=Standard
-URIDate 2020-01-01

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The spot exchange rate at the end of the reporting period. Exchange rate is the ratio of exchange for two currencies. Spot exchange rate is the exchange rate for immediate delivery.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2020-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2020-01-01

+ Details

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Namespace Prefix:	ifrs-full_
Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_BottomOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	ifrs-full_RangeAxis=ifrs-full_TopOfRangeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Significant Accounting Policies (Narrative) (Details)	12 Months Ended
Significant Accounting Policies (Narrative) (Details)	Dec. 31, 2020 ILS (₪)	Dec. 31, 2019	Dec. 31, 2018
Statement Line Items [Line Items]
Increase in balance of right-of-use assets and other receivables
Exchange rates of US$	3.215	3.456	3.748
Bottom of range [member]
Statement Line Items [Line Items]
Percentage of profits includes share of non-controlling interests	20.00%
Top of range [member]
Statement Line Items [Line Items]
Percentage of profits includes share of non-controlling interests	50.00%