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Consolidated Statements of Comprehensive Loss (Parenthetical) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Jun. 25, 2022
Jun. 26, 2021
Jun. 25, 2022
Jun. 26, 2021
Statement of Comprehensive Income [Abstract]        
Net unrealized loss $ 2.5 $ 1.0 $ 11.6 $ 2.2