XML 227 R134.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

Post-employment benefits for associates - Weighted average plan asset allocation (Details) - Pension plans [member] | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Disclosure of fair value of plan assets [line items] |  |
Equity securities | 32.00% | 28.00%
Debt securities | 42.00% | 43.00%
Real estate | 7.00% | 9.00%
Alternative investments | 15.00% | 17.00%
Cash and other investments | 4.00% | 3.00%
Total | 100.00% | 100.00%
Minimum [member] |  |
Disclosure of fair value of plan assets [line items] |  |
Equity securities, target | 15.00% |
Debt securities, target | 20.00% |
Real estate, target | 5.00% |
Alternative investments, target | 0.00% |
Cash and other investments, target | 0.00% |
Maximum [member] |  |
Disclosure of fair value of plan assets [line items] |  |
Equity securities, target | 40.00% |
Debt securities, target | 60.00% |
Real estate, target | 20.00% |
Alternative investments, target | 20.00% |
Cash and other investments, target | 15.00% |

X
- Definition Alternative Investments, Amount Contributed To Fair Value Of Plan Assets, Allocation Percentage + References No definition available. + Details
Name: | alc_AlternativeInvestmentsAmountContributedToFairValueOfPlanAssetsAllocationPercentage
Namespace Prefix: | alc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Alternative Investments, Amount Contributed To Fair Value Of Plan Assets, Target Allocation Percentage + References No definition available. + Details
Name: | alc_AlternativeInvestmentsAmountContributedToFairValueOfPlanAssetsTargetAllocationPercentage
Namespace Prefix: | alc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Cash And Other Investments, Amount Contributed To Fair Value Of Plan Assets, Allocation Percentage + References No definition available. + Details
Name: | alc_CashAndOtherInvestmentsAmountContributedToFairValueOfPlanAssetsAllocationPercentage
Namespace Prefix: | alc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Cash And Other Investments, Amount Contributed To Fair Value Of Plan Assets, Target Allocation Percentage + References No definition available. + Details
Name: | alc_CashAndOtherInvestmentsAmountContributedToFairValueOfPlanAssetsTargetAllocationPercentage
Namespace Prefix: | alc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Debt Instruments, Amount Contributed To Fair Value Of Plan Assets, Allocation Percentage + References No definition available. + Details
Name: | alc_DebtInstrumentsAmountContributedToFairValueOfPlanAssetsAllocationPercentage
Namespace Prefix: | alc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Debt Instruments, Amount Contributed To Fair Value Of Plan Assets, Target Allocation Percentage + References No definition available. + Details
Name: | alc_DebtInstrumentsAmountContributedToFairValueOfPlanAssetsTargetAllocationPercentage
Namespace Prefix: | alc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Equity Instruments, Amount Contributed To Fair Value Of Plan Assets, Allocation Percentage + References No definition available. + Details
Name: | alc_EquityInstrumentsAmountContributedToFairValueOfPlanAssetsAllocationPercentage
Namespace Prefix: | alc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Equity Instruments, Amount Contributed To Fair Value Of Plan Assets, Target Allocation Percentage + References No definition available. + Details
Name: | alc_EquityInstrumentsAmountContributedToFairValueOfPlanAssetsTargetAllocationPercentage
Namespace Prefix: | alc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Plan Assets At Fair Value, Allocation Percentage + References No definition available. + Details
Name: | alc_PlanAssetsAtFairValueAllocationPercentage
Namespace Prefix: | alc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Real Estate, Amount Contributed To Fair Value Of Plan Assets, Allocation Percentage + References No definition available. + Details
Name: | alc_RealEstateAmountContributedToFairValueOfPlanAssetsAllocationPercentage
Namespace Prefix: | alc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Real Estate, Amount Contributed To Fair Value Of Plan Assets, Target Allocation Percentage + References No definition available. + Details
Name: | alc_RealEstateAmountContributedToFairValueOfPlanAssetsTargetAllocationPercentage
Namespace Prefix: | alc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- 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_DisclosureOfFairValueOfPlanAssetsLineItems
Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

X
- Details
Name: | ifrs-full_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |