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Deferred tax assets and liabilities (Details 2) - USD ($) $ in Billions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Statement [line items] |  |
Unremitted earnings retained by consolidated entities for reinvestment | $ 32 | $ 29

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Namespace Prefix: | nvs_
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Balance Type: | credit
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