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Borrowings - Additional Information (Details) - USD ($)
1 Months Ended 12 Months Ended
Feb. 06, 2017
Jun. 30, 2016
Aug. 31, 2013
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2017
Mar. 18, 2019
Debt Instrument [Line Items]              
Principal amount outstanding at June 30, 2019       $ 1,475,700,000      
Outstanding borrowings       1,470,400,000 $ 1,053,400,000    
Fair value of fixed-rate notes       1,490,900,000      
Outstanding borrowings under lines of credit       $ 0 $ 0    
Revolving Credit Facilities | Revolving Credit Facility              
Debt Instrument [Line Items]              
Weighted-average interest rate       3.26% 2.44% 1.79%  
Fiscal 2017 Revolving Credit Facility | Revolving Credit Facility              
Debt Instrument [Line Items]              
Maximum borrowing capacity $ 1,000,000,000.0            
Fiscal 2019 Revolving Credit Facility | London Interbank Offered Rate (LIBOR)              
Debt Instrument [Line Items]              
Basis spread on variable rate 1.00%            
Fiscal 2019 Revolving Credit Facility | Revolving Credit Facility              
Debt Instrument [Line Items]              
Maximum borrowing capacity             $ 1,500,000,000
Debt instrument, term 5 years            
Borrowing tranche period 360 days            
Commitment fee percentage 0.125%            
Line of credit debt issuance costs, gross             2,300,000
Line of credit debt issuance costs, net       $ 3,600,000      
Fiscal 2019 Revolving Credit Facility | Revolving Credit Facility | Long-term debt              
Debt Instrument [Line Items]              
Principal amount outstanding at June 30, 2019       575,700,000      
Unused available capacity       924,300,000      
Fair value of fixed-rate notes       575,700,000      
Fiscal 2019 Revolving Credit Facility, U.S. Dollar Tranche | Revolving Credit Facility              
Debt Instrument [Line Items]              
Maximum borrowing capacity             1,100,000,000
Fiscal 2019 Revolving Credit Facility, U.S. Dollar Tranche | Revolving Credit Facility | Long-term debt              
Debt Instrument [Line Items]              
Outstanding borrowings         $ 160,000,000.0    
Unused available capacity       740,000,000.0      
Fair value of fixed-rate notes       360,000,000.0      
Fiscal 2019 Revolving Credit Facility Multicurrency Tranche | Revolving Credit Facility              
Debt Instrument [Line Items]              
Maximum borrowing capacity             $ 400,000,000.0
Fiscal 2019 Revolving Credit Facility Multicurrency Tranche | Revolving Credit Facility | Long-term debt              
Debt Instrument [Line Items]              
Outstanding borrowings         0    
Unused available capacity       184,300,000      
Fair value of fixed-rate notes       215,700,000      
Fiscal 2014 Senior Notes | Senior Notes              
Debt Instrument [Line Items]              
Debt issuance costs, gross     $ 4,300,000        
Debt instrument amortization period     7 years        
Debt issuance costs, net       700,000 1,300,000    
Stated interest rate     3.95%        
Percentage of principal amount at issuance     99.871%        
Effective interest rate     3.971%        
Fiscal 2014 Senior Notes | Senior Notes | Long-term debt              
Debt Instrument [Line Items]              
Principal amount outstanding at June 30, 2019       400,000,000.0      
Outstanding borrowings       399,200,000 398,500,000    
Fair value of fixed-rate notes       405,400,000 405,800,000    
Fiscal 2016 Senior Notes | Senior Notes              
Debt Instrument [Line Items]              
Debt issuance costs, gross   $ 4,500,000          
Debt instrument amortization period   10 years          
Debt issuance costs, net       3,000,000.0 3,500,000    
Stated interest rate   3.40%          
Percentage of principal amount at issuance   99.589%          
Effective interest rate   3.449%          
Fiscal 2016 Senior Notes | Senior Notes | Long-term debt              
Debt Instrument [Line Items]              
Principal amount outstanding at June 30, 2019       500,000,000.0      
Outstanding borrowings       495,500,000 494,800,000    
Fair value of fixed-rate notes       $ 509,800,000 $ 474,400,000