v3.24.3
Borrowings - Additional Information (Details) - USD ($)
1 Months Ended 3 Months Ended
Aug. 17, 2023
May 31, 2021
Apr. 30, 2021
Mar. 31, 2021
Dec. 31, 2019
Mar. 31, 2019
Jun. 30, 2016
Sep. 30, 2024
Sep. 30, 2023
Jun. 30, 2024
Debt Instrument [Line Items]                    
Principal amount               $ 3,600,000,000    
Fair value, senior notes               3,422,800,000    
Outstanding amount of line of credit               0   $ 0
Revolving Credit Facility                    
Debt Instrument [Line Items]                    
Principal amount               230,000,000.0    
Fair value, senior notes               230,000,000.0    
Senior Notes                    
Debt Instrument [Line Items]                    
Principal amount               2,250,000,000    
Fair value, senior notes               $ 2,072,800,000    
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)               0.15%    
Annual facility fee, step up (as basis points)               0.20%    
Annual facility fee, step down (as basis points)               0.07%    
Fiscal 2021 Revolving Credit Facility: | Revolving Credit Facility | SOFR                    
Debt Instrument [Line Items]                    
Basis spread on variable rate               1.10%    
Fiscal 2021 Revolving Credit Facility: | Revolving Credit Facility | SOFR, Step Up                    
Debt Instrument [Line Items]                    
Basis spread on variable rate               1.175%    
Fiscal 2021 Revolving Credit Facility: | Revolving Credit Facility | SOFR, 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               1.1326%    
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 2019 Revolving Credit Facility | Revolving Credit Facility                    
Debt Instrument [Line Items]                    
Maximum borrowing capacity           $ 1,500,000,000        
Debt instrument, term           5 years        
Fiscal 2021 Revolving Credit Facility U.S. Dollar Tranche | Revolving Credit Facility                    
Debt Instrument [Line Items]                    
Maximum borrowing capacity     $ 1,100,000,000              
Principal amount               $ 230,000,000.0    
Fair value, senior notes               230,000,000.0    
Fiscal 2021 Revolving Credit Facility Multicurrency Tranche | Revolving Credit Facility                    
Debt Instrument [Line Items]                    
Maximum borrowing capacity     $ 400,000,000.0              
Principal amount               0    
Fair value, senior notes               $ 0    
Revolving Credit Facilities | Revolving Credit Facility                    
Debt Instrument [Line Items]                    
Weighted-average interest rate               6.50% 6.41%  
Fiscal 2021 Term Loans | Term Loans                    
Debt Instrument [Line Items]                    
Debt instrument, term       18 months            
Principal amount       $ 2,550,000,000            
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 | SOFR                    
Debt Instrument [Line Items]                    
Basis spread on variable rate       1.00%            
Fiscal 2021 Term Loans, Tranche 2 | Term Loans | SOFR, Step Up                    
Debt Instrument [Line Items]                    
Basis spread on variable rate       1.25%            
Fiscal 2021 Term Loans, Tranche 2 | Term Loans | SOFR, Step Down                    
Debt Instrument [Line Items]                    
Basis spread on variable rate       0.75%            
Fiscal 2024 Amended Term Loan | Term Loans                    
Debt Instrument [Line Items]                    
Principal amount $ 1,300,000,000             $ 1,120,000,000    
Fair value, senior notes               1,120,000,000    
Fiscal 2024 Amended Term Loan | Term Loans | SOFR                    
Debt Instrument [Line Items]                    
Basis spread on variable rate 1.25%                  
Fiscal 2024 Amended Term Loan | Term Loans | SOFR, Step Up                    
Debt Instrument [Line Items]                    
Basis spread on variable rate 1.375%                  
Fiscal 2024 Amended Term Loan | Term Loans | SOFR, Step Down | Maximum                    
Debt Instrument [Line Items]                    
Basis spread on variable rate 1.125%                  
Fiscal 2024 Amended Term Loan | Term Loans | SOFR, Step Down | Minimum                    
Debt Instrument [Line Items]                    
Basis spread on variable rate 1.00%                  
Fiscal 2016 Senior Notes | Senior Notes                    
Debt Instrument [Line Items]                    
Principal amount             $ 500,000,000.0 500,000,000.0    
Interest rate, senior notes             3.40%      
Percentage of principal amount             99.589%      
Effective interest rate, senior notes             3.449%      
Fair value, senior notes               492,800,000    
Fiscal 2016 Senior Notes | Senior Notes | Long-term debt                    
Debt Instrument [Line Items]                    
Fair value, senior notes               492,800,000   480,400,000
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               696,500,000   667,700,000
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%                
Fair value, senior notes               883,600,000    
Fiscal 2021 Senior Notes | Senior Notes | Long-term debt                    
Debt Instrument [Line Items]                    
Fair value, senior notes               $ 883,600,000   $ 843,500,000