Additional Financial Information (Components of Accounts Payable, Accrued Expenses and Other Current Liabilities) (Details) - USD ($) $ in Millions	Jun. 30, 2020	Jun. 30, 2019
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Accrued expenses	$ 907	$ 835
Program rights payable	485	514
Deferred revenue	152	169
Operating lease liabilities	122
Other current liabilities	240	194
Total accounts payable, accrued expenses and other current liabilities	$ 1,906	$ 1,712