Additional Financial Information (Components of Accounts Payable, Accrued Expenses and Other Current Liabilities) (Details) - USD ($) $ in Millions		Dec. 31, 2018	Jun. 30, 2018
Organization Consolidation And Presentation Of Financial Statements [Abstract]
Program rights payable		$ 443	$ 380
Accrued expenses		428	530
Deferred revenue		129	147
Income taxes payable	[1]	127	553
Other current liabilities		114	149
Total accounts payable, accrued expenses and other current liabilities		$ 1,241	$ 1,759

[1] As discussed in Note 1 - Description of Business and Basis of Presentation, income tax items have been calculated as if the Company filed a separate return and was operating as a standalone business. Therefore, tax balances reflected in the Combined Financial Statements may not be reflective of the Company’s actual tax balances prior to or subsequent to the Distribution.