Additional Financial Information - Components of Other Current Assets (Detail) - USD ($) $ in Millions		Sep. 30, 2017	Jun. 30, 2017
Assets, Current [Abstract]
Inventory	[1]	$ 225	$ 208
Amounts due from 21st Century Fox		59	82
Prepayments and other current assets		242	233
Total Other current assets		$ 526	$ 523

[1] Inventory at September 30, 2017 and June 30, 2017 was primarily comprised of books, newsprint and programming rights.