Additional Financial Information (Changes in Net Deferred Tax (Liabilities) Assets) (Details) $ in Millions	9 Months Ended
	Mar. 31, 2019 USD ($)
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Balance, June 30, 2018	$ (1,071)
Tax basis step-up	5,515	[1]
Other	(759)	[2]
Balance, March 31, 2019	$ 3,685

[1] As a result of the Separation and the Distribution, FOX obtained a tax basis in its assets equal to their respective fair market values. This amount represents the additional estimated deferred tax asset recorded as a result of the increased tax basis (See Note 1 – Description of Business and Basis of Presentation under the heading “Basis of Presentation”)

[2] Includes other deferred tax adjustments recorded as of the date of the Distribution (See Note 8 – Related Party Transactions and Twenty-First Century Fox, Inc. Investment under the heading “Corporate Allocations and Twenty-First Century Fox, Inc. Investment”) and current year activity for the nine months ended March 31, 2019.