Financial Instruments and Fair Value Measurements - Additional Information (Detail) $ in Millions, $ in Millions	3 Months Ended			9 Months Ended
	Mar. 31, 2019 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Mar. 31, 2019 USD ($)	Mar. 31, 2018 USD ($)	Mar. 31, 2019 AUD ($)	Jun. 30, 2018 USD ($)	Sep. 30, 2017 USD ($)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimates of net derivative gains related to cash flow hedges included in Accumulated other comprehensive loss	$ 3			$ 3
Equity method investment carrying value	160		$ 123	160			$ 173	$ 136
Non-cash impairments of equity method investment			13
Goodwill carrying value	5,223			5,223			$ 5,218
News America Marketing [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Non-cash impairment charge of goodwill		$ 120
Non-cash impairment charge for indefinite-lived intangible assets		45
Goodwill carrying value		181	301		$ 181
Indefinite-lived intangible assets carrying value		346	391		346
Fox Sports Australia Reporting Unit [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Non-cash impairment charge of goodwill		41
Goodwill carrying value		449	490		449
Foxtel [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity method investment carrying value		631	$ 1,588		631
Non-cash impairments of equity method investment		$ 957			$ 957
Cross Currency Interest Rate Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimates of net derivative gains related to cash flow hedges included in Accumulated other comprehensive loss	1			1
Interest Rate Swap [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Estimates of net derivative gains related to cash flow hedges included in Accumulated other comprehensive loss	4			4
Cash Flow Hedging [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Amount recognized in earnings for ineffective portion of derivative instruments designated as cash flow hedges	2			3
Cash Flow Hedging [Member] | Foreign Exchange Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notional value of derivative	34			34
Cash Flow Hedging [Member] | Cross Currency Interest Rate Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notional value of derivative						$ 400
Cash Flow Hedging [Member] | Interest Rate Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notional value of derivative						700
Fair Value Hedging [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notional value of derivative						$ 100
Adjustments increased the carrying value of long-term debt	3			3
Not Designated as Hedging Instrument, Economic Hedge [Member] | Cross Currency Interest Rate Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Notional value of derivative	$ 75			$ 75