Basis of Presentation and Summary of Significant Accounting Policies (Narrative, Investments) (Details) - USD ($) $ in Millions	12 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2024
Accounting Policies [Abstract]
Equity Method Investment, Other-than-Temporary Impairment	$ 122	$ 0	$ 0

Amount of other-than-temporary decline in value that has been recognized against investment accounted for under equity method of accounting.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 323
-SubTopic 10
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481664/323-10-45-1

Name:	us-gaap_EquityMethodInvestmentOtherThanTemporaryImpairment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration