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Borrowings - Additional Information (Details) - USD ($)
1 Months Ended 3 Months Ended
May 31, 2021
Apr. 30, 2021
Mar. 31, 2021
Dec. 31, 2019
Mar. 31, 2019
Jun. 30, 2016
Sep. 30, 2022
Sep. 30, 2021
Jun. 30, 2022
Debt Instrument [Line Items]                  
Principal amount             $ 4,085,000,000    
Outstanding amount of line of credit             0   $ 0
Long-term debt                  
Debt Instrument [Line Items]                  
Fair value, senior notes             3,718,300,000    
Senior Notes                  
Debt Instrument [Line Items]                  
Principal amount             2,250,000,000    
Fair value, senior notes             $ 1,883,300,000    
Fiscal 2021 Revolving Credit Facility: | Revolving Credit Facility                  
Debt Instrument [Line Items]                  
Maximum borrowing capacity   $ 1,500,000,000              
Debt instrument, term   5 years              
Annual facility fee (as basis points)             0.11%    
Annual facility fee, step up (as basis points)             2000.00%    
Annual facility fee, step down (as basis points)             700.00%    
Principal amount             $ 295,000,000.0    
Fair value, senior notes             $ 295,000,000.0    
Fiscal 2021 Revolving Credit Facility: | Revolving Credit Facility | LIBOR, CDOR, EURIBOR, TIBOR And STIBOR                  
Debt Instrument [Line Items]                  
Basis spread on variable rate             1.015%    
Fiscal 2021 Revolving Credit Facility: | Revolving Credit Facility | LIBOR, CDOR, EURIBOR, TIBOR and STIBOR. Step Up                  
Debt Instrument [Line Items]                  
Basis spread on variable rate             1.175%    
Fiscal 2021 Revolving Credit Facility: | Revolving Credit Facility | LIBOR, CDOR, EURIBOR, TIBOR And STIBOR. Step Down                  
Debt Instrument [Line Items]                  
Basis spread on variable rate             0.805%    
Fiscal 2021 Revolving Credit Facility: | Revolving Credit Facility | Sterling Overnight Interbank Average Rate (SONIA)                  
Debt Instrument [Line Items]                  
Basis spread on variable rate             1.0476%    
Fiscal 2021 Revolving Credit Facility: | Revolving Credit Facility | Sterling Overnight Interbank Average Rate (SONIA), Step Up                  
Debt Instrument [Line Items]                  
Basis spread on variable rate             1.2076%    
Fiscal 2021 Revolving Credit Facility: | Revolving Credit Facility | Sterling Overnight Interbank Average Rate (SONIA), Step Down                  
Debt Instrument [Line Items]                  
Basis spread on variable rate             0.8376%    
Fiscal 2021 Revolving Credit Facility: | Revolving Credit Facility                  
Debt Instrument [Line Items]                  
Maximum borrowing capacity         $ 1,500,000,000        
Debt instrument, term         5 years        
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, Multicurrency Tranche | Revolving Credit Facility                  
Debt Instrument [Line Items]                  
Maximum borrowing capacity   $ 400,000,000              
Fiscal 2021 Term Loans | Term Loans                  
Debt Instrument [Line Items]                  
Debt instrument, term     18 months            
Principal amount     $ 2,550,000,000       $ 1,540,000,000    
Fair value, senior notes             1,540,000,000    
Fiscal 2021 Term Loans, Tranche 1 | Term Loans                  
Debt Instrument [Line Items]                  
Principal amount     1,000,000,000            
Fiscal 2021 Term Loans, Tranche 2 | Term Loans                  
Debt Instrument [Line Items]                  
Principal amount     $ 1,550,000,000            
Fiscal 2021 Term Loans, Tranche 2 | Term Loans | London Interbank Offered Rate (LIBOR)                  
Debt Instrument [Line Items]                  
Basis spread on variable rate     0.875%            
Fiscal 2021 Term Loans, Tranche 2 | Term Loans | London Interbank Offered Rate (LIBOR), Step Up                  
Debt Instrument [Line Items]                  
Basis spread on variable rate     1.25%            
Fiscal 2021 Term Loans, Tranche 2 | Term Loans | London Interbank Offered Rate (LIBOR), Step Down                  
Debt Instrument [Line Items]                  
Basis spread on variable rate     0.75%            
Fiscal 2016 Senior Notes | Senior Notes                  
Debt Instrument [Line Items]                  
Principal amount           $ 500,000,000 500,000,000.0    
Interest rate, senior notes           3.40%      
Percentage of principal amount           99.589%      
Effective interest rate, senior notes           3.449%      
Fiscal 2016 Senior Notes | Senior Notes | Long-term debt                  
Debt Instrument [Line Items]                  
Fair value, senior notes             468,200,000   484,300,000
Fiscal 2020 Senior Notes | Senior Notes                  
Debt Instrument [Line Items]                  
Principal amount       $ 750,000,000     750,000,000.0    
Interest rate, senior notes       2.90%          
Percentage of principal amount       99.717%          
Effective interest rate, senior notes       2.933%          
Fair value, senior notes             624,400,000   658,000,000
Fiscal 2021 Senior Notes | Senior Notes                  
Debt Instrument [Line Items]                  
Principal amount $ 1,000,000,000           1,000,000,000    
Interest rate, senior notes 2.60%                
Percentage of principal amount 99.957%                
Effective interest rate, senior notes 2.605%                
Fiscal 2021 Senior Notes | Senior Notes | Long-term debt                  
Debt Instrument [Line Items]                  
Fair value, senior notes             $ 790,700,000   $ 837,500,000
Revolving Credit Facilities | Revolving Credit Facility                  
Debt Instrument [Line Items]                  
Weighted-average interest rate             3.26% 1.19%