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Restructuring and Employee Severance (Activity Related to Restructuring and Employee Severance Costs) (Details) - USD ($)
$ in Millions
12 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2018
Restructuring Charges [Abstract]      
Employee-related costs $ 66 $ 95 $ 34
Facility Exit and Other Costs 56 30 142
Total restructuring and employee severance $ 122 $ 125 $ 176