Financial Instruments and Fair Value Measurements - Summary of Hedges Classified as Current or Non-Current in Balance Sheets Based on Maturity Dates (Detail) - USD ($) $ in Millions	Jun. 30, 2021	Jun. 30, 2020
Foreign Currency Derivatives | Cash Flow Hedging
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, reported under other current liabilities	$ 0	$ (3)
Cross Currency Interest Rate Derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, reported under other non-current assets	73	0
Derivatives, reported under other non-current liabilities	(13)	0
Cross Currency Interest Rate Derivatives | Cash Flow Hedging
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, reported under other non-current assets	0	98
Derivatives, reported under other non-current liabilities	0	(18)
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	18	24
Interest Rate Contract | Cash Flow Hedging
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives, reported under other current liabilities	(6)	0
Derivatives, reported under other non-current liabilities	$ (3)	$ (16)