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	9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance - beginning of year	$ 79	$ 82
Additions	12	0
Payments	0	0
Measurement adjustments	0	(8)
Accretion	2	3
Foreign exchange movements	(1)	1
Balance - ending of year	$ 92	$ 78