Financial Instruments - Schedule of Gains (Losses) on Derivative and Non-Derivative Financial Instruments Recorded in Accumulated Other Comprehensive (Loss) (Details) - Designated as Hedging Instrument - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2025	Dec. 31, 2024
Cross-currency swap contracts
Derivative Instruments, Gain (Loss) [Line Items]
Derivative and non-derivative instruments gain (loss) recognized in accumulated other comprehensive income (loss)	$ 3	$ 8	$ 5	$ (2)
Foreign currency denominated debt
Derivative Instruments, Gain (Loss) [Line Items]
Derivative and non-derivative instruments gain (loss) recognized in accumulated other comprehensive income (loss)	$ 0	$ 41	$ (1)	$ 19