Restructuring and Employee Severance (Activity Related to Restructuring and Employee Severance Costs) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Restructuring Charges [Abstract]
Employee-related costs	$ 42	$ 12	$ 62	$ 41
Facility Exit and Other Costs	14	0	24	3
Total restructuring and employee severance	$ 56	$ 12	$ 86	$ 44