Financial Instruments and Fair Value Measurements - Summary of Hedges Classified as Current or Non-Current in Balance Sheets Based on Maturity Dates (Details) - USD ($) $ in Millions	Jun. 30, 2024	Jun. 30, 2023
Interest Rate Derivatives | Cash Flow Hedging
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, reported under other current assets	$ 15	$ 21
Derivatives, reported under other non-current assets	14	20
Foreign Currency Derivatives | Cash Flow Hedging
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, reported under other current assets	0	2
Cross Currency Interest Rate Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, reported under other current assets	0	1
Derivatives, reported under other non-current assets	0	36
Derivatives, reported under other current liability	0	(2)
Derivatives, reported under other non-current liability	(2)	0
Cross Currency Interest Rate Derivatives | Fair Value Hedging
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, reported under other non-current assets	0	9
Derivatives, reported under other current liability		$ (1)