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Long-Term Debt - Additional Information (Details) - USD ($)
3 Months Ended
May 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Jun. 30, 2019
Jan. 16, 2014
Debt Instrument [Line Items]          
Long-term debt   $ 2,635,000,000   $ 2,637,500,000  
Revolver | Line of Credit          
Debt Instrument [Line Items]          
Interest expense   0 $ 0    
Credit agreement, maximum capacity   450,000,000      
Long-term debt   $ 0 0 0  
Revolver | Line of Credit | LIBOR | Minimum          
Debt Instrument [Line Items]          
Interest addition to floating rate   1.25%      
Revolver | Line of Credit | LIBOR | Maximum          
Debt Instrument [Line Items]          
Interest addition to floating rate   1.75%      
Term Loan B          
Debt Instrument [Line Items]          
Debt instrument face amount $ 1,000,000,000       $ 800,000,000
Proceeds from issuance of debt $ 1,000,000,000        
Term loan period   7 years      
Term loan quarterly repayment as percentage of principal   0.25%      
Effective interest rate percentage   3.86%      
Interest expense   $ 10,100,000 $ 9,800,000    
Long-term debt   $ 985,000,000   $ 987,500,000  
Term Loan B | LIBOR          
Debt Instrument [Line Items]          
Interest addition to floating rate   1.75%