Financial Instruments and Fair Value Measurements - Summary of Mandatorily Redeemable Noncontrolling Interest Liabilities Classified Level 3 (Detail) - Financial Instruments Subject To Mandatory Redemption Settlement Terms Share Value [Member] - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance - beginning of period	$ 12	$ 12
Payments	(11)	0
Other	$ (1)
Balance - end of period		$ 12