Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended				12 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Mar. 31, 2018	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Intangible Assets And Goodwill [Line Items]
Impairment charges	$ 292				$ 1,690	$ 96	$ 280
Amortization expense of amortizable intangible assets					108	126	100
Finite lived intangible assets, Estimated amortization expense in 2021	98				98
Finite lived intangible assets, Estimated amortization expense in 2022	94				94
Finite lived intangible assets, Estimated amortization expense in 2023	87				87
Finite lived intangible assets, Estimated amortization expense in 2024	83				83
Finite lived intangible assets, Estimated amortization expense in 2025	80				80
Non-cash impairment of goodwill and indefinite-lived intangible assets					89	87	43
Non-cash impairment of goodwill				$ 41	$ 1,098	$ 49
News America Marketing
Intangible Assets And Goodwill [Line Items]
Non-cash impairment of goodwill and indefinite-lived intangible assets				$ 165
Royalty rates				2.50%
Non-cash impairment of goodwill			$ 122	$ 120
Non-cash impairment charge for indefinite-lived intangible assets			113	$ 45
Fox Sports Australia Reporting Unit
Intangible Assets And Goodwill [Line Items]
Non-cash impairment of goodwill and indefinite-lived intangible assets							$ 41
Discount rates							9.50%
Long-term growth rates							2.00%
Other Than Impaired Reporting Units
Intangible Assets And Goodwill [Line Items]
Control premium							10.00%
Foxtel
Intangible Assets And Goodwill [Line Items]
Impairment charges		$ 1,106
Non-cash impairment of goodwill and indefinite-lived intangible assets		$ 931
Long-term growth rates		2.00%
Non-cash impairment of goodwill		$ 882
Fair Value Inputs Earnings Before Interest Taxes Depreciation And Amortization Multiple Rates		10.00%
Fair Value Inputs Royalty Rates		1.50%
Non-cash impairment charge for indefinite-lived intangible assets		$ 49
Minimum | News America Marketing
Intangible Assets And Goodwill [Line Items]
Discount rates				12.50%
Long-term growth rates				(1.90%)
Minimum | Other Than Impaired Reporting Units
Intangible Assets And Goodwill [Line Items]
Discount rates					9.00%	9.00%	8.50%
Long-term growth rates					0.00%	0.00%	(1.00%)
Control premium					5.00%	5.00%
Royalty rates					0.25%	0.50%	0.50%
Minimum | Foxtel
Intangible Assets And Goodwill [Line Items]
Discount rates		10.50%
Maximum | News America Marketing
Intangible Assets And Goodwill [Line Items]
Discount rates				14.00%
Long-term growth rates				0.90%
Maximum | Other Than Impaired Reporting Units
Intangible Assets And Goodwill [Line Items]
Discount rates					22.50%	25.00%	25.00%
Long-term growth rates					3.00%	3.00%	3.00%
Control premium					10.00%	10.00%
Royalty rates					6.00%	6.00%	7.50%
Maximum | Foxtel
Intangible Assets And Goodwill [Line Items]
Discount rates		11.50%
News Media
Intangible Assets And Goodwill [Line Items]
Accumulated impairment loss, goodwill	$ 4,800				$ 4,800	$ 3,700
Non-cash impairment of goodwill					216	49
News Media | News America Marketing
Intangible Assets And Goodwill [Line Items]
Impairment charges			273
Non-cash impairment of goodwill and indefinite-lived intangible assets		$ 175
Non-cash impairment of goodwill			122		235
Non-cash impairment charge for indefinite-lived intangible assets			$ 113
News Media | Minimum | News America Marketing
Intangible Assets And Goodwill [Line Items]
Discount rates			17.00%
Long-term growth rates			0.60%
News Media | Maximum | News America Marketing
Intangible Assets And Goodwill [Line Items]
Discount rates			18.50%
Long-term growth rates			1.50%
Intangible Assets and Goodwill
Intangible Assets And Goodwill [Line Items]
Impairment charges					$ 194	$ 47	$ 50