Equity-Based Compensation (Summary of Restricted Stock Units and Target Performance Stock Units Granted to be Settled in Stock) (Parenthetical) (Details) - USD ($) shares in Thousands, $ in Millions	1 Months Ended	12 Months Ended
	Mar. 31, 2019	Jun. 30, 2020	Jun. 30, 2019		Jun. 30, 2018
Performance Stock Units
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted		1,400
Performance Stock Units | 21CF 2013 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted					3,100
RSUs and PSUs
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted		2,499	1,565	[1]	5,698	[2]
Intrinsic value of unvested stock units		$ 215
Retention RSUs | Tranche Two
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity awards converted, percentage			50.00%
Retention RSUs | Tranche One
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity awards vested, percentage			50.00%
Retention RSUs | 21CF 2013 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted					2,600
Restricted Stock Units (RSUs)
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted	2,400	1,100
Restricted Stock Units (RSUs) | Tranche Two
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity awards vested, percentage	50.00%
Restricted Stock Units (RSUs) | Tranche One
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Equity awards vested, percentage	50.00%
Restricted Stock Units (RSUs) | 21CF 2013 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Granted			1,600

[1] ^{In fiscal 2019, 21CF’s Compensation Committee granted approximately 1.6 million 21CF RSUs to certain employees of the Company that converted into FOX RSUs that will generally vest in August 2021.}

[2] In fiscal 2018, 21CF’s Compensation Committee granted approximately 3.1 million 21CF PSUs to certain employees of the Company that converted into FOX RSUs that will vest in August 2020. In addition, 21CF’s Compensation Committee made a special grant of approximately 2.6 million 21CF restricted stock units (“Retention RSUs”) to certain of the Company’s senior executives, including 21CF named executive officers. Approximately 50% of the Retention RSUs were paid out in shares of 21CF class A common stock and the remaining 50% were converted into FOX RSUs and Disney RSUs on the same pro rata basis accorded to shareholders of 21CF common stock in the mergers contemplated by the 21CF Disney Merger Agreement and vested in fiscal 2020.