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Contingencies and commitments (Sensipar ANDA Patent Litigation) (Details) - lawsuit	1 Months Ended
	Dec. 31, 2017	Jun. 30, 2017	Feb. 28, 2017	Sep. 30, 2016
Sensipar (cinacalcet) Patent Litigation [Member]
Gain Contingencies [Line Items]
Number of lawsuits filed	4	4		14
Amgen Inc. v. Aurobindo Pharma Ltd. et al [Member]
Gain Contingencies [Line Items]
Number of lawsuits consolidated		1	14
Amgen Inc. v. Alkem et al [Member]
Gain Contingencies [Line Items]
Number of lawsuits consolidated		3

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