Restructuring and Employee Severance (Activity Related to Restructuring and Employee Severance Costs) (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Restructuring Charges [Abstract]
Employee-related costs	$ 51	$ 15	$ 34
Facility exit and other costs	5	10	10
Total restructuring and employee severance	$ 56	$ 25	$ 44