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Contingencies and commitments (Details) $ in Millions |  |  |  | 8 Months Ended | 9 Months Ended
--- | --- | --- | --- | --- | ---
Oct. 03, 2018 patent | Sep. 11, 2018 USD ($) | Aug. 31, 2018 patent | Aug. 30, 2018 patent | Sep. 30, 2018 patent
MVASI Patent Litigation [Member] |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |
Loss contingency, number of patents allegedly infringed |  |  | 8 | 26 |
Adello NEUPOGEN Patent Litigation [Member] |  |  |  |  |
Gain Contingencies [Line Items] |  |  |  |  |
Gain contingency, number of patents allegedly infringed upon |  |  |  |  | 17
Adello NEUPOGEN Patent Litigation [Member] | Subsequent Event [Member] |  |  |  |  |
Gain Contingencies [Line Items] |  |  |  |  |
Gain contingency, number of patents allegedly infringed upon | 4 |  |  |  |
Hospira EPOGEN Patent Litigation [Member] |  |  |  |  |
Gain Contingencies [Line Items] |  |  |  |  |
Amount awarded in damages for infringement of patent | $ |  | $ 70 |  |  |

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