Financial Instruments and Risk Management (Market risk - Terms of Derivative Financial Instruments Used to Economically Hedge Foreign Currency Risk) (Details) $ in Millions	12 Months Ended
Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Put options [Member] \| U.S Dollar/ILS [Member]
Disclosure of detailed information about hedges [Line Items]
Carrying amount	$ 1	$ 5
Stated amount	$ 695	$ 525
Average exchange rate	3.6	3.4
Put options [Member] \| Euro/U.S Dollar [Member]
Disclosure of detailed information about hedges [Line Items]
Carrying amount	$ 2	$ 0
Stated amount	$ 45	$ 63
Average exchange rate	1.2	1.2
Put options [Member] \| U.S Dollar/British Pound [Member]
Disclosure of detailed information about hedges [Line Items]
Carrying amount	$ 0
Stated amount	$ 11
Average exchange rate	1.3
Put options [Member] \| U.S Dollar/Japanese Yen [Member]
Disclosure of detailed information about hedges [Line Items]
Carrying amount	$ 0	$ 0
Stated amount	$ 3	$ 3
Average exchange rate	114.3	115.5
Call options [Member] \| U.S Dollar/ILS [Member]
Disclosure of detailed information about hedges [Line Items]
Carrying amount	$ (15)	$ (1)
Stated amount	$ 695	$ 525
Average exchange rate	3.6	3.4
Call options [Member] \| Euro/U.S Dollar [Member]
Disclosure of detailed information about hedges [Line Items]
Carrying amount	$ 0	$ (2)
Stated amount	$ 45	$ 63
Average exchange rate	1.2	1.2
Call options [Member] \| U.S Dollar/British Pound [Member]
Disclosure of detailed information about hedges [Line Items]
Carrying amount	$ 0
Stated amount	$ 11
Average exchange rate	1.3
Call options [Member] \| U.S Dollar/Japanese Yen [Member]
Disclosure of detailed information about hedges [Line Items]
Carrying amount	$ 0	$ 0
Stated amount	$ 3	$ 3
Average exchange rate	114.3	115.5
Swap contract [Member] \| U.S Dollar/ILS [Member]
Disclosure of detailed information about hedges [Line Items]
Carrying amount	$ 15	$ 64
Stated amount	$ 486	$ 489
Average exchange rate	3.7	3.7
Swap contract [Member] \| Euro/U.S Dollar [Member]
Disclosure of detailed information about hedges [Line Items]
Carrying amount	$ (1)
Stated amount	$ 334
Average exchange rate	1.1
SWAP contracts from variable interest to fixed interest [Member]
Disclosure of detailed information about hedges [Line Items]
Carrying amount	$ 0	$ (3)
Stated amount	250	350
SWAP contracts from variable USD interest to fixed EUR interest [Member]
Disclosure of detailed information about hedges [Line Items]
Carrying amount	(1)	(1)
Stated amount	334	51
SWAP contracts from fixed ILS interest to fixed USD interest [Member]
Disclosure of detailed information about hedges [Line Items]
Carrying amount	15	64
Stated amount	486	489
Forward contracts [Member] \| U.S Dollar/ILS [Member]
Disclosure of detailed information about hedges [Line Items]
Carrying amount	2	2
Stated amount	$ 352	$ 430
Average exchange rate	3.7	3.5
Forward contracts [Member] \| Euro/U.S Dollar [Member]
Disclosure of detailed information about hedges [Line Items]
Carrying amount	$ 2	$ (3)
Stated amount	$ 86	$ 320
Average exchange rate	1.2	1.2
Forward contracts [Member] \| Euro/British Pound [Member]
Disclosure of detailed information about hedges [Line Items]
Carrying amount	$ 1	$ 0
Stated amount	$ 19	$ 20
Average exchange rate	0.9	0.9
Forward contracts [Member] \| U.S Dollar/British Pound [Member]
Disclosure of detailed information about hedges [Line Items]
Carrying amount	$ 0	$ 0
Stated amount	$ 32	$ 24
Average exchange rate	1.3	1.3
Forward contracts [Member] \| U.S Dollar/Chinese Yuan Renminbi [Member]
Disclosure of detailed information about hedges [Line Items]
Carrying amount	$ 0	$ (1)
Stated amount	$ 29	$ 33
Average exchange rate	6.5	6.7
Forward contracts [Member] \| Other [Member]
Disclosure of detailed information about hedges [Line Items]
Carrying amount	$ 0	$ 0
Stated amount	$ 37	$ 33
Average exchange rate	0	0

The average exchange rate used by the entity. Exchange rate is the ratio of exchange for two currencies.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2018-01-01
-Paragraph 112
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_112_c&doctype=Standard
-URIDate 2018-03-16

+ Details

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Data Type:	xbrli:decimalItemType
Balance Type:	na
Period Type:	duration

- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

+ Details

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- Definition

The fair value of financial instruments designated as hedging instruments. Hedging instruments are designated derivatives or (for a hedge of the risk of changes in foreign currency exchange rates only) designated non-derivative financial assets or non-derivative financial liabilities whose fair value or cash flows are expected to offset changes in the fair value or cash flows of a designated hedged item. [Refer: At fair value [member]; Derivatives [member]; Derivative financial assets; Derivative financial liabilities; Financial instruments, class [member]; Financial assets; Financial liabilities]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Note Expiry date 2021-01-01
-Name IFRS
-Number 7
-IssueDate 2018-01-01
-Paragraph 22
-Subparagraph b
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-02&anchor=para_22_b&doctype=Standard&book=b
-URIDate 2018-03-16

+ Details

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- Definition

The gain (loss) on the change in fair value of the hedging instrument used as a basis for recognising hedge ineffectiveness. Hedge ineffectiveness is the extent to which the changes in the fair value or the cash flows of the hedging instrument are greater or less than those on the hedged item.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2018-01-01
-Paragraph 24A
-Subparagraph c
-URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2018-03-01&anchor=para_24A_c&doctype=Standard
-URIDate 2018-03-16

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Details

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Namespace Prefix:
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- Details

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Data Type:	na
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- Details

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Data Type:	na
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- Details

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Data Type:	na
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- Details

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- Details

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Data Type:	na
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- Details

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Data Type:	na
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- Details

Name:	ifrs-full_ClassesOfFinancialInstrumentsAxis=icl_SwapContractFromVariableToFixedInterestMember
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Data Type:	na
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- Details

Name:	ifrs-full_ClassesOfFinancialInstrumentsAxis=icl_SwapContractsFromVariableUSDInterestToFixedEURInterestMember
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Data Type:	na
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- Details

Name:	ifrs-full_ClassesOfFinancialInstrumentsAxis=icl_SwapContractFromFixedILSToFixedUSDInterestILSMember
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Data Type:	na
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- Details

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- Details

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- Details

Name:	ifrs-full_TypesOfRisksAxis=icl_USDRMBCurrencyRiskMember
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- Details

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