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Contingencies and commitments (Additional Information) (Details)	1 Months Ended		3 Months Ended
	Jun. 08, 2021 lawsuit	Jun. 30, 2018 lawsuit	Apr. 30, 2019 lawsuit numberOfPlaintiffs numberOfClaims	May 27, 2022 argument	Mar. 11, 2022 States
Sensipar Antitrust Class Actions | Pending Litigation
Loss Contingencies [Line Items]
Loss contingency, number of plaintiffs | numberOfPlaintiffs			4
Loss contingency, number of lawsuits | numberOfClaims			2
Loss contingency, number of lawsuits filed			4
Number of lawsuits filed		4
Loss Contingency, Number Of States In Which Plaintiffs Reside | States					10
ChemoCentryx, Inc. Securities Matters
Loss Contingencies [Line Items]
Loss Contingency, Number Of Class Action Suits	2
Regeneron Pharmaceuticals Inc. Antitrust Action | Pending Litigation
Loss Contingencies [Line Items]
Loss Contingency, Number Of Primary Arguments | argument				2

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The total number of new claims filed pertaining to a loss contingency during the period.

+ References

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)
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