Income Taxes - Net Impact of Tax Refund and Interest, Net of Tax, Recorded in Statement of Operations (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended
	Mar. 31, 2014		Mar. 31, 2013		Mar. 31, 2014		Mar. 31, 2013
Components Of Income Tax Expense Benefit [Line Items]
Other, net	$ 0	[1]	$ 0	[1]	$ (721)	[1]	$ 0	[1]
21st Century Fox [Member]
Components Of Income Tax Expense Benefit [Line Items]
Other, net					(721)
Income tax benefit					721
Net impact to the Statement of Operations					$ 0

[1] See Note 12 - Income Taxes