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Fair Value Measurements - Schedule of Carrying and Fair Values of Financial Instruments (Details) - USD ($)
$ in Millions
Dec. 26, 2018
Jun. 27, 2018
Dec. 27, 2017
Sep. 28, 2016
Jun. 26, 2013
Fair Value Disclosure, Senior Notes [Line Items]          
Sales price of JV     $ 18.0    
Notes Receivable, Fair Value Disclosure $ 11.9   $ 16.0    
3.88% notes [Member]          
Fair Value Disclosure, Senior Notes [Line Items]          
Debt Instrument, Interest Rate, Stated Percentage 3.88%       3.88%
Long-term Debt $ 298.4 $ 298.2      
Long-term Debt, Fair Value $ 283.2 285.3      
5.00% notes [Member]          
Fair Value Disclosure, Senior Notes [Line Items]          
Debt Instrument, Interest Rate, Stated Percentage 5.00%     5.00%  
Long-term Debt $ 345.6 345.2      
Long-term Debt, Fair Value $ 326.9 $ 342.3