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Post-employment benefits for employees (Details 6) - Other post-employment benefit plans | 12 Months Ended
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Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Disclosure of defined benefit plans [line items] |  |  |
Healthcare cost trend rate assumed for next year | 6.50% | 6.00% | 6.30%
Rate to which the cost trend rate is assumed to decline | 4.50% | 4.50% | 4.50%
Year that the rate reaches the ultimate trend rate | 2031 | 2028 | 2028

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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Namespace Prefix: | ifrs-full_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | nvs_DefinedBenefitPlanHealthCareCostTrendRateAssumedNextFiscalYear
Namespace Prefix: | nvs_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | nvs_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
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Namespace Prefix: | nvs_
Data Type: | xbrli:gYearItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | nvs_RetirementPlanTypeAxis=nvs_OtherPostemploymentBenefitPlansMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |