Restructuring and Employee Severance (Activity Related to Restructuring and Employee Severance Costs) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2020	Dec. 31, 2019
Restructuring Charges [Abstract]
Employee-related costs	$ 8	$ 42	$ 32	$ 62
Facility Exit and Other Costs	12	14	25	24
Total restructuring and employee severance	$ 20	$ 56	$ 57	$ 86