Related Party Transactions and Twenty-First Century Fox, Inc. Investment (Components of the Net Increase in the Twenty-First Century Fox, Inc. Investment) (Details) $ in Millions	3 Months Ended
	Sep. 30, 2018 USD ($)
Related Party Transactions [Abstract]
Cash pooling, general financing activities and other	$ 580	[1]
Corporate allocations	85
Net increase in Twenty-First Century Fox, Inc. investment	$ 665

[1] The nature of activities included in the line item ‘Cash pooling, general financing activities and other’ includes financing activities, capital transfers, cash sweeps, other treasury services and Direct Corporate Expenses.