Description of Business and Summary of Significant Accounting Policies - Performance Obligations (Details) $ in Millions	Sep. 29, 2018 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Performance Obligations	$ 407.9
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2018-09-30
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Performance Obligations	$ 384.8
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation period	9 months
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2019-06-30
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Performance Obligations	$ 22.7
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation period	1 year
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-06-30
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Performance Obligations	$ 0.4
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Performance obligation period