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Leases (Summary of Operating Lease Liabilities) (Details) - USD ($)
$ in Millions
Jun. 30, 2021
Jun. 30, 2020
Fiscal Year    
2022 $ 103  
2023 101  
2024 100  
2025 90  
2026 50  
Thereafter 145  
Total lease payments 589  
Less: imputed interest (88)  
Present value of operating lease liabilities $ 501 $ 574