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Contingencies and commitments (Details)				2 Months Ended		6 Months Ended
	Jul. 24, 2019 patent	Jun. 04, 2019 actions	May 20, 2019 patent	May 31, 2019 actions	Apr. 30, 2019 actions	Jun. 30, 2019 plaintiffs lawsuit
Humira Biosimilar Antitrust Class Actions [Member]
Loss Contingencies [Line Items]
Number of lawsuits | actions		12		2	10
Sensipar Antitrust Class Actions [Member]
Loss Contingencies [Line Items]
Number of lawsuits | lawsuit						4
Number of plaintiffs | plaintiffs						1
Patent Trial and Appeal Board Patent Challenges [Member]
Loss Contingencies [Line Items]
Number of patents allegedly infringed upon			1
Subsequent Event [Member] | KANJINTI Patent Litigation [Member]
Loss Contingencies [Line Items]
Number of patents allegedly infringed upon	8

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Loss Contingency, Number Of Lawsuits

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Number of plaintiffs that have filed claims pertaining to a loss contingency.

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Number of another entity's patents that the entity has allegedly infringed.

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