Share Repurchase Program - Narrative (Details) - USD ($)	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015	Oct. 31, 2014
Equity [Abstract]
Share repurchase program, authorized amount				$ 500,000,000
Shares purchase (in shares)	0	3,762,200	2,995,272