Summary of Significant Accounting Policies (Schedule of Receivables, Net) (Details) - USD ($) $ in Millions		Jun. 30, 2020	Jun. 30, 2019
Receivables [Abstract]
Total receivables		$ 1,981	$ 2,007
Allowances for doubtful accounts		(93)	(35)
Total receivables, net	[1]	$ 1,888	$ 1,972

[1] Includes $5 million of non-current receivables recorded in Other non-current assets on the Consolidated Balance Sheet as of June 30, 2019.