Borrowings - Schedule of Borrowings (Detail) - USD ($) $ in Millions	6 Months Ended
Dec. 31, 2018	Jun. 30, 2018
Debt and Financial Instruments [Line Items]
Total borrowings	$ 1,680	$ 1,952
Less: current portion	(744)	(462)
Long-term borrowings	$ 936	1,490
Credit Facility 2013 [Member] \| Foxtel Group [Member]
Debt and Financial Instruments [Line Items]
Interest rate	3.84%
Due date	Apr. 07, 2019
Total	$ 211	222
Credit Facility 2014 Tranche 1 [Member] \| Foxtel Group [Member]
Debt and Financial Instruments [Line Items]
Interest rate	3.84%
Due date	May 30, 2019
Total	$ 140	148
Working Capital Facility 2017 [Member] \| Foxtel Group [Member]
Debt and Financial Instruments [Line Items]
Interest rate	4.14%
Due date	Jul. 03, 2020
Total	$ 42	59
Credit Facility 2014 Tranche 2 [Member] \| Foxtel Group [Member]
Debt and Financial Instruments [Line Items]
Interest rate	3.94%
Due date	Jan. 31, 2020
Total	$ 141	148
Credit Facility 2015 [Member] \| Foxtel Group [Member]
Debt and Financial Instruments [Line Items]
Interest rate	3.99%
Due date	Jul. 31, 2020
Total	$ 282	296
Credit Facility 2016 [Member] \| Foxtel Group [Member]
Debt and Financial Instruments [Line Items]
Interest rate	4.54%
Due date	Sep. 11, 2021
Total	$ 0	108
US Private Placement 2009 Tranche 3 [Member] \| Foxtel Group [Member]
Debt and Financial Instruments [Line Items]
Interest rate	6.20%
Due date	Sep. 24, 2019
Total	$ 75	75
US Private Placement 2012 USD Portion Tranche 1 [Member] \| Foxtel Group [Member]
Debt and Financial Instruments [Line Items]
Interest rate	3.68%
Due date	Jul. 25, 2019
Total	$ 149	150
US Private Placement 2012 USD Portion Tranche 2 [Member] \| Foxtel Group [Member]
Debt and Financial Instruments [Line Items]
Interest rate	4.27%
Due date	Jul. 25, 2022
Total	$ 197	196
US Private Placement 2012 USD Portion Tranche 3 [Member] \| Foxtel Group [Member]
Debt and Financial Instruments [Line Items]
Interest rate	4.42%
Due date	Jul. 25, 2024
Total	$ 147	146
US Private Placement 2012 AUD Portion [Member] \| Foxtel Group [Member]
Debt and Financial Instruments [Line Items]
Interest rate	7.04%
Due date	Jul. 25, 2022
Total	$ 78	83
Credit Facility Fiscal 2016 Tranche 2 [Member] \| REA Group Inc [Member]
Debt and Financial Instruments [Line Items]
Interest rate	2.67%
Due date	Dec. 31, 2018
Total	$ 0	89
Credit Facility Fiscal 2016 Tranche 3 [Member] \| REA Group Inc [Member]
Debt and Financial Instruments [Line Items]
Interest rate	3.00%
Due date	Dec. 31, 2019
Total	$ 169	178
Credit Facility Fiscal 2018 [Member] \| REA Group Inc [Member]
Debt and Financial Instruments [Line Items]
Interest rate	2.83%
Due date	Apr. 27, 2021
Total	$ 49	$ 54

Debt and Financial Instruments [Line Items]

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt, classified as current. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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Amount after unamortized (discount) premium and debt issuance costs of long-term debt classified as noncurrent and excluding amounts to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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