Commitments and Contingencies - Schedule of Commitments by Fiscal Year Maturity (Detail) $ in Millions, $ in Billions	Jun. 30, 2020 AUD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)
Commitments and Contingencies [Line Items]
Total commitments and contractual obligations		$ 6,430
Commitments and contractual obligations, Payments due Less than 1 year		1,225
Commitments and contractual obligations, Payments due 1-3 years		2,582
Commitments and contractual obligations, Payments due 3-5 years		1,327
Commitments and contractual obligations, Payments due More than 5 years		1,296
Total future minimum lease payments		128
Finance leases, Less than 1 Year		31
Finance lease, Payments due more than 5 years		0
Total borrowings		1,259	$ 1,453
Borrowings, Payments due Less than 1 year		48
Borrowings, Payments due More than 5 years		11
Subleases from 21st Century Fox		13
Purchase Obligations
Commitments and Contingencies [Line Items]
Purchase obligations, Total		904
Purchase obligations, Payments due Less than 1 year		316
Purchase obligations, Payments due 1-3 years		343
Purchase obligations, Payments due 3-5 years		133
Purchase obligations, Payments due More than 5 years		112
Borrowings
Commitments and Contingencies [Line Items]
Total borrowings		1,141
Borrowings, Payments due Less than 1 year		48
Borrowings, Payments due 1-3 years		761
Borrowings, Payments due 3-5 years		321
Borrowings, Payments due More than 5 years		11
Interest Payments on Borrowings
Commitments and Contingencies [Line Items]
Interest payments on borrowings, Total		107
Interest payments on borrowings, Payments due Less than 1 year		39
Interest payments on borrowings, Payments due 1-3 years		53
Interest payments on borrowings, Payments due 3-5 years		15
Interest payments on borrowings, Payments due More than 5 years		0
Land and Buildings
Commitments and Contingencies [Line Items]
Operating leases, Total		1,343
Operating leases, Payments due Less than 1 year		138
Operating leases, Payments due 1-3 years		273
Operating leases, Payments due 3-5 years		227
Operating leases, Payments due More than 5 years		705
Plant and Machinery
Commitments and Contingencies [Line Items]
Operating leases, Total		21
Operating leases, Payments due Less than 1 year		9
Operating leases, Payments due 1-3 years		10
Operating leases, Payments due 3-5 years		2
Operating leases, Payments due More than 5 years		0
Sports Programming Rights
Commitments and Contingencies [Line Items]
Sports programming rights, Total		1,790
Sports programming rights, Payments due Less than 1 year		408
Sports programming rights, Payments due 1-3 years		665
Sports programming rights, Payments due 3-5 years		363
Sports programming rights, Payments due More than 5 years		354
Sports Programming Rights | National Rugby League
Commitments and Contingencies [Line Items]
Sports programming rights, Total	$ 1.5
Programming Costs
Commitments and Contingencies [Line Items]
Programming costs, Total		781
Programming costs, Payments due Less than 1 year		209
Programming costs, Payments due 1-3 years		370
Programming costs, Payments due 3-5 years		182
Programming costs, Payments due More than 5 years		20
Transmission Costs
Commitments and Contingencies [Line Items]
Transmission costs, Total		215
Transmission costs, Payments due Less than 1 year		27
Transmission costs, Payments due 1-3 years		52
Transmission costs, Payments due 3-5 years		42
Transmission costs, Payments due More than 5 years		94
Total future minimum lease payments		128
Finance leases, Less than 1 Year		31
Finance lease, Payments 1-3 years		55
Finance leases, Payments due 3-5 years		42
Finance lease, Payments due more than 5 years		$ 0