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Consolidated Statements of Comprehensive Loss (Parenthetical) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jun. 26, 2021
Jun. 27, 2020
Jun. 26, 2021
Jun. 27, 2020
Statement of Comprehensive Income [Abstract]        
Change in value of hedged interest rate swap and interest rate cap, tax $ 1.0 $ (1.5) $ 2.2 $ (7.9)