Document and Entity Information - USD ($) $ in Billions	12 Months Ended
	Jun. 30, 2020	Aug. 05, 2020	Dec. 31, 2019
Document And Entity Information [Line Items]
Document Type	10-K
Amendment Flag	false
Document Annual Report	true
Document Transition Report	false
Document Period End Date	Jun. 30, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	FY
Entity Registrant Name	FOX CORPORATION
Entity Central Index Key	0001754301
Current Fiscal Year End Date	--06-30
Entity Filer Category	Large Accelerated Filer
Entity Well-known Seasoned Issuer	Yes
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Voluntary Filers	No
Entity Shell Company	false
Entity Small Business	false
Entity Emerging Growth Company	false
Entity File Number	001-38776
Entity Tax Identification Number	83-1825597
Entity Address, Address Line One	1211 Avenue of the Americas
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Incorporation, State or Country Code	DE
Entity Address, Postal Zip Code	10036
City Area Code	212
Local Phone Number	852-7000
Entity Public Float			$ 0.0
Documents Incorporated by Reference	Certain information required for Part III of this Annual Report on Form 10-K is incorporated by reference to the Fox Corporation definitive Proxy Statement for its 2020 Annual Meeting of Stockholders, which is intended to be filed with the Securities and Exchange Commission pursuant to Regulation 14A of the Securities Exchange Act of 1934, as amended, within 120 days of Fox Corporation’s fiscal year end.
Class A Common Stock
Document And Entity Information [Line Items]
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	FOXA
Entity Public Float			12.7
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		343,678,951
Class B Common Stock
Document And Entity Information [Line Items]
Title of 12(b) Security	Common Stock, par value $0.01 per share
Trading Symbol	FOX
Entity Public Float			$ 5.8
Security Exchange Name	NASDAQ
Entity Common Stock, Shares Outstanding		261,078,355