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Contingencies and commitments (Additional Information) (Details) $ in Millions |  |  |  | 1 Months Ended | 3 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Jun. 02, 2021 USD ($) claim | Jul. 31, 2019 lawsuit | Apr. 30, 2019 claim | Apr. 30, 2019 agreement | May 31, 2019 complaints | Apr. 30, 2019 plaintiffs lawsuit claim | Oct. 26, 2021 claim | May 31, 2020 claim | Jun. 04, 2019 claim | May 20, 2019 claim
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |
Number of claims |  |  |  |  |  |  |  |  |  | 1
Novartis Breach Of Contract Action |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |
Number of claims | 2 |  |  |  |  |  | 2 |  |  |
Loss Contingency, Damages Paid, Value | $ | $ 48 |  |  |  |  |  |  |  |  |
Agreements breached | agreement |  |  |  | 2 |  |  |  |  |  |
Sensipar Antitrust Class Actions |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |
Loss contingency, number of plaintiffs | plaintiffs |  |  |  |  |  | 4 |  |  |  |
Loss contingency, number of lawsuits |  |  | 4 |  |  | 2 |  |  |  |
Loss contingency, number of lawsuits filed | lawsuit |  | 4 |  |  |  | 4 |  |  |  |
Humira Biosimilar Antitrust Class Actions |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |
Number of claims |  |  |  |  |  |  |  | 12 | 12 |
Number of complaints stayed | complaints |  |  |  |  | 6 |  |  |  |  |

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- Definition Amount of damages paid to the plaintiff in the legal matter. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 9 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14557-108349 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14435-108349 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349 + Details
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