Income Taxes (Schedule of Unrecognized Tax Benefits Roll Forward) (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning year	$ 510	$ 650	$ 654
Additions for tax positions of the current year	15	16	22
Additions for tax positions of prior years	69	94	97
Reductions for tax positions of prior years	(42)	(40)	(30)
Settlements with tax authorities	(10)	(210)	(93)
Balance at end year	$ 542	$ 510	$ 650