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v3.20.4

Events subsequent to the December 31 consolidated balance sheet date (Details 2) $ in Millions | Dec. 31, 2020 USD ($)
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Subsequent Event [member] |
Statement [line items] |
Estimated acquisition fair value of total consideration | $ 235

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- References No definition available. + Details
Name: | nvs_EstimatedAcquisitionFairValueOfTotalConsideration
Namespace Prefix: | nvs_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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

X
- Details
Name: | nvs_SubsequentEventTypAxis=nvs_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |