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Supplemental Cash Flow Information - Non-Cash Investing and Financing Activities (Details) - USD ($)
$ in Millions
6 Months Ended
Dec. 26, 2018
Dec. 27, 2017
Other Significant Noncash Transactions [Line Items]    
Retirement of fully depreciated assets $ 16.6 $ 22.4
Accrued capital expenditures 14.2 4.7
Capital lease additions 2.5 4.3
Dividend Declared [Member]    
Other Significant Noncash Transactions [Line Items]    
Dividends declared but not paid $ 14.8 $ 18.2