Inventories, Net (Narrative) (Details) - USD ($)	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Inventory [Line Items]
Operating expenses	$ 8,037,000,000	$ 7,807,000,000	$ 7,327,000,000
Cable Network Programming And Television Segments | Operating Expenses | Sports Programming Rights and Entertainment Programming Rights
Inventory [Line Items]
Inventory Write-down	0	$ 95,000,000	$ 55,000,000
Amortization Expense
Inventory [Line Items]
Operating expenses	$ 5,900,000,000