Revenue Recognition - Performance Obligation (Details) - Everest Medicines II Limited - Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-04-30 $ in Millions	Apr. 29, 2019 USD ($)
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation	$ 65.0
Remaining performance obligation period	15 years