Financial Instruments - Schedule of Carrying Value and Estimated Fair Value of Long-Term Debt (Details) - USD ($) $ in Millions	Mar. 31, 2026	Jun. 30, 2025
Carrying value of long-term debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	$ 7,523	$ 7,555
Estimated fair value of long-term debt
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term debt	$ 7,120	$ 7,174

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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