Financial Instruments - Schedule of (Losses) Gains on Derivative and Non-Derivative Financial Instruments Recorded in Accumulated Other Comprehensive (Loss) (Details) - Designated as Hedging Instrument - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Cross-currency swap contracts
Derivative Instruments, Gain (Loss) [Line Items]
Derivative and non-derivative instruments gain (loss) recognized in accumulated other comprehensive (loss)	$ (30)	$ (4)
Foreign currency denominated debt
Derivative Instruments, Gain (Loss) [Line Items]
Derivative and non-derivative instruments gain (loss) recognized in accumulated other comprehensive (loss)	$ (56)	$ 10