Commitments and Contingencies (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2019	Jun. 30, 2019
Loss Contingencies [Line Items]
Total firm commitments and future debt payments	$ 40,000	$ 41,000
Profits Participants Litigation
Loss Contingencies [Line Items]
Litigation settlement	34
U.K. Newspaper Matters Indemnity
Loss Contingencies [Line Items]
Liability related to indemnity	$ 50	$ 50