Borrowings - Schedule of Borrowings (Detail) - USD ($) $ in Millions	9 Months Ended
	Mar. 31, 2019	Jun. 30, 2018
Debt and Financial Instruments [Line Items]
Total borrowings	$ 1,546	$ 1,952
Less: current portion	(678)	(462)
Long-term borrowings	868	1,490
Credit Facility 2013 [Member] | New Foxtel [Member]
Debt and Financial Instruments [Line Items]
Total borrowings	$ 0	222
Interest rate	3.55%
Due date	Apr. 07, 2019
Credit Facility 2014 Tranche 1 [Member] | New Foxtel [Member]
Debt and Financial Instruments [Line Items]
Total borrowings	$ 142	148
Interest rate	3.55%
Due date	May 30, 2019
Working Capital Facility 2017 [Member] | New Foxtel [Member]
Debt and Financial Instruments [Line Items]
Total borrowings	$ 57	59
Interest rate	3.85%
Due date	Jul. 03, 2020
Credit Facility 2014 Tranche 2 [Member] | New Foxtel [Member]
Debt and Financial Instruments [Line Items]
Total borrowings	$ 142	148
Interest rate	3.65%
Due date	Jan. 31, 2020
Credit Facility 2015 [Member] | New Foxtel [Member]
Debt and Financial Instruments [Line Items]
Total borrowings	$ 284	296
Interest rate	3.70%
Due date	Jul. 31, 2020
Credit Facility 2016 [Member] | New Foxtel [Member]
Debt and Financial Instruments [Line Items]
Total borrowings	$ 53	108
Interest rate	4.25%
Due date	Sep. 11, 2021
US Private Placement 2009 Tranche 3 [Member] | New Foxtel [Member]
Debt and Financial Instruments [Line Items]
Total borrowings	$ 74	75
Interest rate	6.20%
Due date	Sep. 24, 2019
US Private Placement 2012 USD Portion Tranche 1 [Member] | New Foxtel [Member]
Debt and Financial Instruments [Line Items]
Total borrowings	$ 150	150
Interest rate	3.68%
Due date	Jul. 25, 2019
US Private Placement 2012 USD Portion Tranche 2 [Member] | New Foxtel [Member]
Debt and Financial Instruments [Line Items]
Total borrowings	$ 198	196
Interest rate	4.27%
Due date	Jul. 25, 2022
US Private Placement 2012 USD Portion Tranche 3 [Member] | New Foxtel [Member]
Debt and Financial Instruments [Line Items]
Total borrowings	$ 148	146
Interest rate	4.42%
Due date	Jul. 25, 2024
US Private Placement 2012 AUD Portion [Member] | New Foxtel [Member]
Debt and Financial Instruments [Line Items]
Total borrowings	$ 78	83
Interest rate	7.04%
Due date	Jul. 25, 2022
Credit Facility Fiscal 2016 Tranche 2 [Member] | REA Group Inc [Member]
Debt and Financial Instruments [Line Items]
Total borrowings	$ 0	89
Due date	Dec. 31, 2018
Credit Facility Fiscal 2016 Tranche 3 [Member] | REA Group Inc [Member]
Debt and Financial Instruments [Line Items]
Total borrowings	$ 170	178
Interest rate	3.01%
Due date	Dec. 31, 2019
Credit Facility Fiscal 2018 [Member] | REA Group Inc [Member]
Debt and Financial Instruments [Line Items]
Total borrowings	$ 50	$ 54
Interest rate	2.71%
Due date	Apr. 27, 2021