Equity-Based Compensation - Summary of Stock Option Transactions (Parenthetical) (Detail) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2012
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Options impacted by the Separation	0	[1]	786,000	[1]	0	[1]
Intrinsic value of options outstanding	$ 3.1		$ 4.3		$ 18.4
Unvested stock options	0		0

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