Consolidated Statements of Stockholders' Equity (Parenthetical) - $ / shares shares in Millions	12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2014
Statement of Stockholders' Equity [Abstract]
Treasury stock acquired, shares	2.1	5.7	3.4
Treasury stock reissued, shares	2.2	4.4	3.9
Dividends declared per common share	$ 1.20	$ 1.08	$ 0.84