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Provisions and other non-current liabilities (Details) - Legal proceedings provision [member] - USD ($) $ in Millions | Jul. 20, 2020 | Jun. 30, 2020
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Disclosure of other provisions [line items] |  |
Amount of settlement in principle |  | $ 300.0
Product liability, government investigations, other legal matters provisions |  | 100.0
Product liability, government investigations, other legal matters provisions, payments | $ 100.0 |
US | Sandoz [member] |  |
Disclosure of other provisions [line items] |  |
Product liability, government investigations, other legal matters provisions |  | 186.0
Amount of settlement in principle |  | 195.0
US | NPC and others [member] |  |
Disclosure of other provisions [line items] |  |
Amount of settlement in principle |  | 700.0
Product liability, government investigations, other legal matters provisions |  | $ 700.0
Product liability, government investigations, other legal matters provisions, payments | $ 600.0 |

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