Revenue and Contract Acquisition Costs - Summary of Revenue from Contracts with Customers (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Disaggregation of Revenue [Line Items]
Revenue	$ 234.0	$ 192.1	$ 658.3	$ 528.8
U.S. Omnipod
Disaggregation of Revenue [Line Items]
Revenue	132.3	109.4	377.7	293.6
International Omnipod
Disaggregation of Revenue [Line Items]
Revenue	79.8	67.8	226.1	187.4
Total Omnipod
Disaggregation of Revenue [Line Items]
Revenue	212.1	177.2	603.8	481.0
Drug Delivery
Disaggregation of Revenue [Line Items]
Revenue	$ 21.9	$ 14.9	$ 54.5	$ 47.8