Acquisitions, Disposals and Other Transactions - Schedule of Fair Value of Assets Acquired and Liabilities Assumed (Detail) - USD ($) $ in Millions	Jun. 30, 2019	Jun. 30, 2018	Apr. 30, 2018	Jun. 30, 2017	Sep. 30, 2016
Assets acquired:
Goodwill	$ 5,147	$ 5,218		$ 3,838
Foxtel [Member]
Assets acquired:
Cash			$ 78
Current assets			492
Property, plant and equipment			967
Intangible assets			861
Goodwill			1,559
Other non-current assets			268
Total assets acquired			4,225
Liabilities assumed:
Current liabilities			611
Long-term borrowings			1,751
Other non-current liabilities			323
Total liabilities assumed			2,685
Net assets acquired			$ 1,540
Wireless Group Plc [Member]
Assets acquired:
Intangible assets					$ 220
Goodwill					115
Liabilities assumed:
Long-term borrowings					23
Net liabilities					(50)
Net assets acquired					$ 285