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Fair Value Measurements - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended
Dec. 26, 2020
Jun. 27, 2020
Dec. 28, 2019
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]      
Intangible asset and equipment impairment charges $ 0.0   $ 30.2
Borrowed principal 1,000.0    
Credit Agreement      
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]      
Borrowed principal 1,400.0    
2025 Senior Notes      
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]      
Fair value of debt instrument 427.0    
2028 Senior Notes      
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]      
Fair value of debt instrument $ 974.0    
Medical Aesthetics      
Fair Value, Off-balance Sheet Risks, Disclosure Information [Line Items]      
Intangible asset and equipment impairment charges   $ 30.2