Consolidated Statements of Comprehensive (Loss) Income (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013
Statement of Comprehensive Income [Abstract]
Unrealized holding (losses) gains on securities, income tax expense	$ 0	$ 14	$ 0
Benefit plan adjustments, income tax (benefit) expense	(11)	(3)	5
Share of other comprehensive income from equity affiliates, income tax expense (benefit)	$ 1	$ (1)	$ 0