Revenue Recognition - Remaining Performance Obligation (Details) $ in Millions	Jun. 30, 2019 USD ($)
Revenue from Contract with Customer [Abstract]
Aggregate transaction price allocated to performance obligations	$ 94.5
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date: 2019-07-01
Revenue from Contract with Customer [Abstract]
Aggregate transaction price allocated to performance obligations	$ 89.9
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, expected duration	12 months