Contingencies (Details) R$ in Millions, $ in Millions		1 Months Ended					3 Months Ended	12 Months Ended
	Sep. 30, 2019 USD ($)	Feb. 19, 2020 patent	Dec. 31, 2019 request patent demand	Jul. 31, 2019 BRL (R$)	Jul. 31, 2018 BRL (R$)	Jun. 30, 2018 case	Jun. 30, 2020 patent	Dec. 31, 2019 request patent lawsuit demand
Dr Reddy's Lab
Loss Contingencies [Line Items]
Claims settled and dismissed, limited initial market entry, supply term			21 days
Claims settled and dismissed | case						2
Japanese Administrative Proceedings
Loss Contingencies [Line Items]
Number of demands | demand			3					3
Number of patents			2					2
Emgality Patent Litigation
Loss Contingencies [Line Items]
Number of patents			9					9
Insulin Pricing Litigation and Proceedings, House of Representatives’ Committee on Energy and Commerce
Loss Contingencies [Line Items]
Number of requests for information | request			2					2
Brazil | Employee Litigation
Loss Contingencies [Line Items]
Damages awarded, value	$ 125			R$ 500	R$ 500
Number of lawsuits | lawsuit								30
Subsequent Event | Emgality Patent Litigation
Loss Contingencies [Line Items]
Number of patents		9
Number of patents, claims dismissed		6
Forecast | Emgality Patent Litigation
Loss Contingencies [Line Items]
Number of patents, claims decision expected							3