Restructuring and Employee Severance (Activity Related to Restructuring and Employee Severance Costs) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016
Restructuring Charges [Abstract]
Employee-related costs	$ 14	$ 6	$ 27	$ 11
Facility exit and other costs	1	0	4	8
Total restructuring and employee severance	$ 15	$ 6	$ 31	$ 19