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Basis of Presentation and Summary of Significant Accounting Policies (Narrative, Inventories) (Details) - USD ($) $ in Millions	Jun. 30, 2025	Jun. 30, 2024
Accounting Policies [Abstract]
Portion of inventories held at LIFO, percentage	52.00%	50.00%
Inventory Reserve Excess and Obsolete [Member]
Inventory Reserve Table [Line Items]
Reserves for excess and obsolete inventory	$ 132	$ 149

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Inventory Reserve Table [Line Items]

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- Definition

Amount of valuation reserve for inventory.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 330
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 5.BB)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480581/330-10-S99-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(6))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

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The percentage of LIFO (last in first out) inventory to total inventory as of the balance sheet date if other than 100 percent.

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