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Fair Value Measurements (Fair Value of Assets and Liabilities Measured on a Recurring Basis) (Details) - Fair Value, Measurements, Recurring - USD ($)
$ in Millions
Jun. 30, 2023
Jun. 30, 2022
Assets:    
Cash equivalents $ 1,253 $ 2,425
Forward contracts (73) 15
Other investments 101 97
Liabilities:    
Forward contracts (73) 15
Level 1    
Assets:    
Cash equivalents 1,253 2,425
Forward contracts 0 0
Other investments 101 97
Liabilities:    
Forward contracts 0 0
Level 2    
Assets:    
Cash equivalents 0 0
Forward contracts (73) 15
Other investments 0 0
Liabilities:    
Forward contracts (73) 15
Level 3    
Assets:    
Cash equivalents 0 0
Forward contracts 0 0
Other investments 0 0
Liabilities:    
Forward contracts $ 0 $ 0