Related Party Transactions and Twenty-First Century Fox, Inc. Investment (Narrative) (Details) $ in Millions	3 Months Ended
Sep. 30, 2018 USD ($)
Selling, General and Administrative Expenses [Member]
Related Party Transaction [Line Items]
General Corporate Expenses	$ 75

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.

No definition available.

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