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Borrowings - Narrative (Details) - USD ($)
3 Months Ended 6 Months Ended
Jan. 15, 2020
Mar. 27, 2020
Mar. 27, 2020
Dec. 27, 2019
Sep. 27, 2019
Senior Notes | 5.125% senior notes, due January 2024          
Debt Instrument [Line Items]          
Long-term debt       $ 902,213,000 $ 902,351,000
Interest rate stated percentage       5.125%  
Secured Debt | Senior secured term loan facility, due March 2024          
Debt Instrument [Line Items]          
Long-term debt       $ 829,535,000 $ 829,344,000
Foreign          
Debt Instrument [Line Items]          
Long-term debt       $ 923,600,000  
Subsequent Event | Term Loan Facility, US Term Loan B, Due 2027          
Debt Instrument [Line Items]          
Percentage of term loan principal repaid quarterly 1.00%        
Subsequent Event | Senior Notes | 5.125% senior notes, due January 2024          
Debt Instrument [Line Items]          
Repayments of debt     $ 900,000,000.0    
Interest rate stated percentage 5.125%        
Redemption price, percentage     102.563%    
Subsequent Event | Senior Notes | 5.125% senior notes, due January 2024          
Debt Instrument [Line Items]          
Call premium $ 23,100,000        
Subsequent Event | Term Loan Facilities | Term Loan Facility, US Term Loan B, Due 2027          
Debt Instrument [Line Items]          
Payments of financing costs     $ 6,500,000    
Subsequent Event | Secured Debt | Term Loan Facility, US Term Loan B, Due 2027          
Debt Instrument [Line Items]          
Long-term debt $ 900,000,000.0        
Original issue discount of debt instrument, percentage 0.125%        
Subsequent Event | Secured Debt | Fed Funds Rate | Term Loan Facility, US Term Loan B, Due 2027          
Debt Instrument [Line Items]          
Basis spread on variable rate     0.50%    
Subsequent Event | Secured Debt | LIBOR | Term Loan Facility, US Term Loan B, Due 2027          
Debt Instrument [Line Items]          
Basis spread on variable rate     1.75%    
Basis spread on variable base rate     1.00%    
Minimum interest rate 0.00%        
Subsequent Event | Secured Debt | Base Rate | Term Loan Facility, US Term Loan B, Due 2027          
Debt Instrument [Line Items]          
Basis spread on variable rate   0.75%      
Minimum interest rate 0.00%