Related Party Transactions - Schedule of Amount of Receivables Due from and Payable to Related Parties (Detail) - USD ($) $ in Millions	Jun. 30, 2018	Jun. 30, 2017
Related Party Transactions [Abstract]
Accounts receivable from related parties	$ 32	$ 92
Notes receivable from related parties	0	370
Accounts payable to related parties	$ 17	$ 13

For an unclassified balance sheet, amount of receivables arising from transactions with related parties.

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Name:	us-gaap_AccountsReceivableRelatedParties
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant