Additional Financial Information - Components of Other Current Assets (Detail) - USD ($) $ in Millions		Dec. 31, 2017	Jun. 30, 2017
Assets, Current [Abstract]
Inventory	[1]	$ 216	$ 208
Amounts due from 21st Century Fox		52	82
Prepayments and other current assets		215	233
Total Other current assets		$ 483	$ 523

[1] Inventory at December 31, 2017 and June 30, 2017 was primarily comprised of books, newsprint, printing ink and programming rights.