Basis of Presentation and Summary of Significant Accounting Policies (Narrative, Sales Returns and Allowances) (Details) - USD ($) $ in Millions	12 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Accounting Policies [Abstract]
Accrual for estimated sales returns and allowances	$ 479	$ 479
Revenue Recognition, Sales Returns, Reserve for Sales Returns	$ 2,200	$ 2,400	$ 2,300

Amount of estimated sales returns.

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=84158767&loc=d3e18780-107790

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