Basis of Presentation and Summary of Significant Accounting Policies (Narrative, Recent Financial Accounting Standards) (Details) - USD ($) $ in Millions	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Expected Impact of Lease Standard Adoption on Recognition of Operating Lease Liabilities	$ 400
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount	$ 687	$ 626	$ 494	$ 541

Amount of valuation and qualifying accounts and reserves.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 4
-Subparagraph (SX 210.12-09)
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690

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