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Restructuring and Employee Severance (Activity Related to Restructuring and Employee Severance Costs) (Details) - USD ($)
$ in Millions
3 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Restructuring Charges [Abstract]    
Employee-related costs $ 20 $ 29
Facility Exit and Other Costs 10 3
Total restructuring and employee severance $ 30 $ 32