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Stock-Based Compensation and Stock Plans - Employee Stock Purchase Plan (ESPP) Activity (Details) - USD ($)
$ in Millions
3 Months Ended
Sep. 30, 2017
Oct. 01, 2016
Stock-Based Compensation    
Compensation expense $ 9.3 $ 7.7
Employee Stock Purchase Plan    
Stock-Based Compensation    
Compensation expense $ 0.8 $ 0.5
Expected term (years) 6 months 6 months
Expected volatility 53.00% 36.60%
Risk-free interest rate 1.02% 0.35%
Dividend yield 0.00% 0.00%