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Contingencies and commitments (Sandoz Patent Litigation) (Details) - Sandoz Inc.			1 Months Ended
	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

Gain Contingency, Number of Lawsuits Filed

+ References

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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

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