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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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- Definition 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) -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 + Details
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