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Contingencies and commitments (Details) $ in Millions |  |  |  |  | 1 Months Ended | 9 Months Ended
--- | --- | --- | --- | --- | --- | ---
Sep. 04, 2019 patent | Aug. 22, 2019 patent | Aug. 09, 2019 lawsuit | Jul. 31, 2019 lawsuit | Sep. 30, 2019 patent | Sep. 30, 2019 USD ($)
Humira Biosimilar Antitrust Class Actions [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Number of lawsuits | lawsuit |  |  | 12 |  |  |
Sensipar Antitrust Class Actions [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Number of lawsuits | lawsuit |  |  |  | 4 |  |
Hospira [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Damages awarded | $ |  |  |  |  |  | $ 70
Kanjinti Genetech Litigation [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Number of patents allegedly infringed upon | patent | 4 |  |  |  |  |
Mvasi Patent Litigation, Genentech, Inc. (Genentech) and the City of Hope [Member] |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |
Number of patents allegedly infringed upon | patent |  | 1 |  |  | 6 |

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