Restructuring and Employee Severance (Activity Related to Restructuring and Employee Severance Costs) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Restructuring Charges [Abstract]
Employee-related costs	$ 6	$ 0	$ 13	$ 6
Facility exit and other costs	1	2	3	8
Total restructuring and employee severance	$ 7	$ 2	$ 16	$ 14