Consolidated Statements of Comprehensive (Loss) Income (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Statement of Comprehensive Income [Abstract]
Unrealized holding (losses) gains on securities, income tax expense	$ 0	$ 0	$ 14
Benefit plan adjustments, income tax expense (benefit)	(14)	(11)	(3)
Share of other comprehensive income from equity affiliates, income tax (benefit) expenses	$ (7)	$ 1	$ (1)