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Investments, Forward Contracts and Fair Value Measurements - Available for Sale Securities Reconciliation (Details) - USD ($)
$ in Millions
Sep. 28, 2019
Jun. 29, 2019
Available-for-sale Debt Securities [Abstract]    
Amortized Cost/ Carrying Cost $ 0.9 $ 0.9
Gross Unrealized Gains 0.0 0.0
Gross Unrealized Losses (0.3) (0.3)
Fair Value 0.6 0.6
Asset-backed securities    
Available-for-sale Debt Securities [Abstract]    
Amortized Cost/ Carrying Cost 0.9 0.9
Gross Unrealized Gains 0.0 0.0
Gross Unrealized Losses (0.3) (0.3)
Fair Value $ 0.6 $ 0.6