Additional Financial Information - Components of Other Current Liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2018	Jul. 01, 2018	Jun. 30, 2018
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Other current liabilities	$ 670	$ 566	$ 372
Other Current Liabilities [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Current tax payable	18		17
Allowance for sales returns	216		0
Royalties and commissions payable	223		187
Other	213		168
Total Other current liabilities	$ 670		$ 372