XML 173 R114.htm IDEA: XBRL DOCUMENT
v3.20.4

Provisions and other current liabilities - Accruals for deductions from revenue (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Subclassifications of assets, liabilities and equities [abstract] |  |  |
January 1 | $ 212 | $ 194 | $ 213
Additions | 540 | 662 | 603
Payments/utilizations | (537) | (646) | (613)
Changes in offset against gross trade receivables | (2) | 1 | 2
Currency translation effects | 4 | 1 | (11)
December 31 | $ 217 | $ 212 | $ 194

X
- Definition Decrease Through Payments And Utilizations, Current Contract Liabilities + References No definition available. + Details
Name: | alc_DecreaseThroughPaymentsAndUtilizationsCurrentContractLiabilities
Namespace Prefix: | alc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Increase (Decrease) Through Changes In Offset Against Receivables, Current Contract Liabilities + References No definition available. + Details
Name: | alc_IncreaseDecreaseThroughChangesInOffsetAgainstReceivablesCurrentContractLiabilities
Namespace Prefix: | alc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Increase (Decrease) Through Foreign Exchange, Current Contract Liabilities + References No definition available. + Details
Name: | alc_IncreaseDecreaseThroughForeignExchangeCurrentContractLiabilities
Namespace Prefix: | alc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Increase Due To Additions, Current Contract Liabilities + References No definition available. + Details
Name: | alc_IncreaseDueToAdditionsCurrentContractLiabilities
Namespace Prefix: | alc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition The amount of current contract liabilities. [Refer: Contract liabilities] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 15 -IssueDate 2020-01-01 -Paragraph 105 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=15&code=ifrs-tx-2020-en-r&anchor=para_105&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_CurrentContractLiabilities
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- References No definition available. + Details
Name: | ifrs-full_SubclassificationsOfAssetsLiabilitiesAndEquitiesAbstract
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration