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Restructuring Charges (Separation and Restructuring Plan Activity) (Detail) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Jul. 01, 2019
Sep. 30, 2020
Jun. 30, 2020
Restructuring Cost and Reserve [Line Items]      
Liability beginning balance $ 25,083 $ 1,435 $ 25,083
Increase in liability (separation and other charges)   490 4,955
Reduction in liability (payments and adjustments)   (1,688) (3,573)
Liability ending balance 53 $ 237 $ 1,435
ASC 842      
Restructuring Cost and Reserve [Line Items]      
Reduction in liability from ASU implementation $ (25,030)