Additional Financial Information - Components of Other Non-Current Assets (Detail) - USD ($) $ in Millions		Jun. 30, 2018	Jun. 30, 2017
Assets, Noncurrent [Abstract]
Royalty advances to authors		$ 312	$ 298
Inventory	[1]	143	31
Other		376	113
Total Other non-current assets		$ 831	$ 442

[1] Primarily consists of the non-current portion of programming rights.