v3.26.1
Fair Value Measurements (Fair Value of Assets and Liabilities Measured on a Recurring Basis) (Details) - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2024
Assets:      
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Purchases $ 234 $ 739  
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Vesting 258 82  
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Change in Estimated Fair Value (13) 41  
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Settlements $ (45) (19)  
Level 3      
Assets:      
Discount Rate, fair value inputs 8.00%    
Fair Value, Measurements, Recurring      
Assets:      
Cash equivalents $ 2,299 1,672  
Forward contracts (32) (48)  
Equity Securities, FV-NI (1,277) (843) $ 0
Other investments 118 108  
Fair Value, Measurements, Recurring | Level 1      
Assets:      
Cash equivalents 2,299 1,672  
Forward contracts 0 0  
Equity Securities, FV-NI 0    
Other investments 118 108  
Fair Value, Measurements, Recurring | Level 2      
Assets:      
Cash equivalents 0 0  
Forward contracts (32) (48)  
Equity Securities, FV-NI 0 0  
Other investments 0 0  
Fair Value, Measurements, Recurring | Level 3      
Assets:      
Cash equivalents 0 0  
Forward contracts 0 0  
Equity Securities, FV-NI (1,277) (843)  
Other investments $ 0 $ 0