Basis of Presentation and Summary of Significant Accounting Policies (Narrative, Sales Returns and Allowances) (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Accounting Policies [Abstract]
Accrual for estimated sales returns and allowances	$ 689	$ 495
Revenue Recognition, Sales Returns, Reserve for Sales Returns	$ 2,600	$ 2,300	$ 2,200