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Contingencies and commitments (Narrative) (Details)	Feb. 21, 2023 patent	Feb. 20, 2023 patent	May 31, 2021 numberOfNotices
Domestic Tax Authority
Loss Contingencies [Line Items]
Number of notices on proposed additional tax | numberOfNotices			2
Janseen Biotech, Inc Patent Litigation | Pending Litigation
Loss Contingencies [Line Items]
Number of patents allegedly infringed upon | patent	4	2

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 9
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=121557415&loc=d3e14557-108349

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