XML 56 R42.htm IDEA: XBRL DOCUMENT v3.25.2

Financial instruments - Disclosure of net value of unsettled positions for derivative forward contracts and swaps (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Financial Instruments [Abstract]
Unrealized gains in Other current assets	$ 7	$ 12
Unrealized losses in Current financial debts	(10)	(4)
Net value of unsettled positions for derivatives contracts	$ (3)	$ 8

X

- Definition

Current Derivative Financial Assets (Liabilities), Net

+ References

No definition available.

+ Details

Name:	alc_CurrentDerivativeFinancialAssetsLiabilitiesNet
Namespace Prefix:	alc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Financial Instruments

+ References

No definition available.

+ Details

Name:	alc_FinancialInstrumentsAbstract
Namespace Prefix:	alc_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

The amount of current derivative financial assets. [Refer: Derivative financial assets]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 55
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_55&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_CurrentDerivativeFinancialAssets
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

The amount of current derivative financial liabilities. [Refer: Derivative financial liabilities]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 55
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_55&doctype=Standard
-URIDate 2024-03-27

+ Details

Name:	ifrs-full_CurrentDerivativeFinancialLiabilities
Namespace Prefix:	ifrs-full_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant