Financial Instruments and Fair Value Measurements - Summary of Derivative Instruments Designated as Cash Flow Hedges (Detail) - Cash Flow Hedging [Member] - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019	Dec. 31, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain (loss) recognized in Accumulated Other Comprehensive Loss	$ (13)	$ 31	$ (13)	$ 18
(Gain) loss reclassified from Accumulated Other Comprehensive Loss	13	(25)	(4)	(10)
Foreign Currency Derivatives [Member] | Operating Expense [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain (loss) recognized in Accumulated Other Comprehensive Loss	(1)	2	(2)	4
(Gain) loss reclassified from Accumulated Other Comprehensive Loss	0	(1)	(2)	(2)
Cross Currency Interest Rate Derivatives [Member] | Interest (Expense) Income, Net [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain (loss) recognized in Accumulated Other Comprehensive Loss	(13)	30	(8)	16
(Gain) loss reclassified from Accumulated Other Comprehensive Loss	12	(26)	3	(12)
Interest rate derivatives [Member] | Interest (Expense) Income, Net [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Gain (loss) recognized in Accumulated Other Comprehensive Loss	1	(1)	(3)	(2)
(Gain) loss reclassified from Accumulated Other Comprehensive Loss	$ 1	$ 2	$ (5)	$ 4