Retirement Benefit Obligations - Schedule of Components of Net Periodic Costs (Detail) - USD ($) $ in Millions		12 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Defined Benefit Plan Disclosure [Line Items]
Service cost benefits earned during the period		$ 12	$ 17	$ 20
Interest costs on projected benefit obligations		72	74	70
Expected return on plan assets		(93)	(93)	(78)
Amortization of deferred losses		16	15	21
Amortization of prior service costs		(13)	(13)	(13)
Settlements, curtailments and other		2	7	15
Net periodic benefits costs-Direct		(4)	7	35
Employees participation in 21st Century Fox plans				16
Corporate allocations	[1]			5
Net periodic benefits costs- Total		(4)	7	56
Domestic Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost benefits earned during the period		1	4	1
Interest costs on projected benefit obligations		17	16	11
Expected return on plan assets		(22)	(17)	(13)
Amortization of deferred losses		3	4	3
Settlements, curtailments and other		2	4
Net periodic benefits costs-Direct		1	11	2
Employees participation in 21st Century Fox plans				16
Corporate allocations	[1]			5
Net periodic benefits costs- Total		1	11	23
Foreign Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost benefits earned during the period		11	12	18
Interest costs on projected benefit obligations		49	51	51
Expected return on plan assets		(71)	(76)	(65)
Amortization of deferred losses		13	12	15
Settlements, curtailments and other			3	15
Net periodic benefits costs-Direct		2	2	34
Net periodic benefits costs- Total		2	2	34
Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost benefits earned during the period		0	1	1
Interest costs on projected benefit obligations		6	7	8
Amortization of deferred losses			(1)	3
Amortization of prior service costs		(13)	(13)	(13)
Net periodic benefits costs-Direct		(7)	(6)	(1)
Net periodic benefits costs- Total		$ (7)	$ (6)	$ (1)

[1] The allocated expense includes corporate executives of 21st Century Fox, allocated using a proportional allocation methodology, which management has deemed as reasonable.