XML 184 R125.htm IDEA: XBRL DOCUMENT
v3.20.4

Post-employment benefits for associates - Weighted average actuarial assumptions (Details) | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Pension plans [member] |  |
Disclosure of defined benefit plans [line items] |  |
Discount rate | 1.20% | 1.70%
Expected rate of pension increase | 1.10% | 1.20%
Expected rate of salary increase | 2.40% | 3.30%
Interest on savings account | 1.00% | 1.00%
Current average life expectancy for a 65-year-old male (in years) | 20 years | 21 years
Current average life expectancy for a 65-year-old female (in years) | 23 years | 24 years
Pension plans [member] | SWITZERLAND | Country of domicile [member] |  |
Disclosure of defined benefit plans [line items] |  |
Discount rate | 0.10% | 0.30%
Pension plans [member] | UNITED STATES | Foreign countries [member] |  |
Disclosure of defined benefit plans [line items] |  |
Discount rate | 2.40% | 3.10%
Pension plans [member] | GERMANY | Foreign countries [member] |  |
Disclosure of defined benefit plans [line items] |  |
Discount rate | 0.80% | 1.10%
Pension plans [member] | UNITED KINGDOM | Foreign countries [member] |  |
Disclosure of defined benefit plans [line items] |  |
Discount rate | 1.30% | 2.00%
Other post-employment benefit plans [member] |  |
Disclosure of defined benefit plans [line items] |  |
Discount rate | 2.30% | 3.30%
Expected rate of pension increase |  |
Expected rate of salary increase |  |
Interest on savings account |  |
Current average life expectancy for a 65-year-old male (in years) | 20 years | 21 years
Current average life expectancy for a 65-year-old female (in years) | 22 years | 23 years
Other post-employment benefit plans [member] | UNITED STATES | Foreign countries [member] |  |
Disclosure of defined benefit plans [line items] |  |
Discount rate | 2.30% | 3.30%

X
- Definition Actuarial Assumption Of Interest On Savings Account + References No definition available. + Details
Name: | alc_ActuarialAssumptionOfInterestOnSavingsAccount
Namespace Prefix: | alc_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Actuarial Assumption Of Life Expectancy After Retirement, Female + References No definition available. + Details
Name: | alc_ActuarialAssumptionOfLifeExpectancyAfterRetirementFemale
Namespace Prefix: | alc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Actuarial Assumption Of Life Expectancy After Retirement, Male + References No definition available. + Details
Name: | alc_ActuarialAssumptionOfLifeExpectancyAfterRetirementMale
Namespace Prefix: | alc_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition The discount rate used as the significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit obligation, at present value; Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2020-01-01 -Paragraph 144 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_144&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_ActuarialAssumptionOfDiscountRates
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The expected rate of increases in pension that is used as a significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit plans [member]; Defined benefit obligation, at present value; Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2020-01-01 -Paragraph 144 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_144&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_ActuarialAssumptionOfExpectedRatesOfPensionIncreases
Namespace Prefix: | ifrs-full_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The expected rate of salary increases used as a significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit plans [member]; Defined benefit obligation, at present value; Actuarial assumptions [member]] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 19 -IssueDate 2020-01-01 -Paragraph 144 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=19&code=ifrs-tx-2020-en-r&anchor=para_144&doctype=Standard -URIDate 2020-01-01 + Details
Name: | ifrs-full_ActuarialAssumptionOfExpectedRatesOfSalaryIncreases
Namespace Prefix: | ifrs-full_
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_DisclosureOfDefinedBenefitPlansLineItems
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: | srt_StatementGeographicalAxis=country_CH
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=ifrs-full_CountryOfDomicileMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_US
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | ifrs-full_GeographicalAreasAxis=ifrs-full_ForeignCountriesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_DE
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=country_GB
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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