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Income Taxes - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended 12 Months Ended
Dec. 26, 2018
Dec. 27, 2017
Dec. 26, 2018
Dec. 27, 2017
Jun. 27, 2018
Income Tax Disclosure [Line Items]          
Effective Income Tax Rate, Percent 8.60% 38.30% 13.00% 37.40%  
Federal Statutory Income Tax Rate, Percent         28.10%
Tax reform impact   $ 8.7      
Sale Leaseback [Member]          
Income Tax Disclosure [Line Items]          
Income tax impact of gain on sale leaseback transactions $ 75.0   $ 75.0    
Income Taxes Paid     67.1    
Accrued income tax payable, current, on sale leaseback $ 7.9   $ 7.9