Related Party Transactions and Twenty-First Century Fox, Inc. Investment (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Dec. 31, 2018	Dec. 31, 2018
Selling, General and Administrative Expenses [Member]
Related Party Transaction [Line Items]
General Corporate Expenses	$ 95	$ 170

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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