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Contingencies and commitments (Sandoz Patent Litigation) (Details) - Sandoz Inc. |  |  | 1 Months Ended
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Oct. 12, 2021 patent | Sep. 28, 2021 patent | Jun. 30, 2018 lawsuit
Gain Contingencies [Line Items] |  |  |
Number of lawsuits filed | lawsuit |  |  | 19
Pending Litigation |  |  |
Gain Contingencies [Line Items] |  |  |
Gain Contingency, Patents Found Not Infringed upon, Number | patent | 3 | 3 |

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- Definition Number of entity's patents that another entity was found not to have infringed. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 30 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=6397426&loc=d3e17499-108355 + Details
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