XML 186 R127.htm IDEA: XBRL DOCUMENT
v3.20.4

Post-employment benefits for associates - Healthcare cost trend rate assumptions used for other post-employment benefits (Details) - Other post-employment benefit plans [member] | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
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Disclosure of defined benefit plans [line items] |  |  |
Healthcare cost trend rate assumed for next year | 6.20% | 6.50% | 7.00%
Rate to which the cost trend rate is assumed to decline | 4.50% | 4.50% | 4.50%

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- Definition Health Care Cost Trend Rate Assumed, Next Fiscal Year + References No definition available. + Details
Name: | alc_HealthCareCostTrendRateAssumedNextFiscalYear
Namespace Prefix: | alc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Definition Ultimate Health Care Cost Trend Rate + References No definition available. + Details
Name: | alc_UltimateHealthCareCostTrendRate
Namespace Prefix: | alc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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

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- Details
Name: | ifrs-full_CharacteristicsOfDefinedBenefitPlansAxis=ifrs-full_PostemploymentMedicalDefinedBenefitPlansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |