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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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Gain Contingency, Number Of Agreements Breached

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Loss Contingency, Number Of Complaints Stayed By The Court

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Loss Contingency, Number of Lawsuits Filed

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Amount of damages paid to the plaintiff in the legal matter.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
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Number of plaintiffs that have filed claims pertaining to a loss contingency.

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Number of pending claims pertaining to a loss contingency.

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