Stock-Based Compensation Unrecognized Compensation Cost (Details) $ in Millions	Jun. 29, 2018 USD ($)
Stock-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	$ 115.6
Stock Awards
Stock-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	59.6
Stock Options
Stock-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost	$ 56.0