Additional Financial Information (Components of Other, Net) (Parenthetical) (Details) - USD ($) $ in Millions	3 Months Ended
Sep. 30, 2020	Sep. 30, 2019
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Settlement of Divestiture Tax prepayment	$ 462	$ 0

Amount of cash inflow (outflow) from the settlement of divestiture tax prepayment.

No definition available.

Name:	fox_SettlementOfDivestitureTaxPrepayment
Namespace Prefix:	fox_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration