Contingencies and commitments (Details)				84 Months Ended
	Mar. 09, 2018 petition	Mar. 08, 2018 patent	Mar. 05, 2018 lawsuit	Feb. 15, 2018 patent	Mar. 02, 2018 claim
Sanofi/Regeneron Patent Litigation [Member]
Loss Contingencies [Line Items]
Number of pending claims | claim					2
Sensipar (cinacalcet) Patent Litigation [Member]
Loss Contingencies [Line Items]
Gain contingency, number of lawsuits filed | lawsuit			4
Adello NEUPOGEN Patent Litigation [Member]
Loss Contingencies [Line Items]
Gain contingency, patents allegedly infringed upon, number		17
Apotex NEUPOGEN/Neulasta [Member]
Loss Contingencies [Line Items]
Loss contingency, patents allegedly infringed, number				1
Coherus ENBREL Patent Challenge [Member]
Loss Contingencies [Line Items]
Number of denied petitions | petition	2