Equity-Based Compensation - Summary of Stock Option Transactions (Parenthetical) (Detail) - USD ($) shares in Thousands, $ in Millions		12 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Options impacted by the Separation	[1]	0	0	786
Intrinsic value of options outstanding		$ 12.8	$ 3.1	$ 4.3
Weighted average remaining contractual life, options outstanding		6 years 4 days
Weighted average remaining contractual life, options exercisable		4 years 4 months 2 days

[1] Represents 0.8 million of outstanding options as of the Distribution Date, which were converted into and settled in Class A Common Stock of 21st Century Fox.