Contingencies and commitments (Sandoz Patent Litigation) (Details)			1 Months Ended
	Apr. 30, 2019 patent affiliate	Feb. 26, 2016 patent affiliate	Jun. 30, 2018 lawsuit
ENBREL (etanercept)
Gain Contingencies [Line Items]
Gain contingency, number of affiliates | affiliate	2	2
Number of patents allegedly infringed | patent	5	5
Otezla
Gain Contingencies [Line Items]
Number Of lawsuits | lawsuit			19