Share-Based Compensation - Summary of Director Stock Units Activity (Details) - Non-employee Board of Director's Plan - $ / shares	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Number of Units
Balance at the beginning of the period (in shares)	329,746	338,553	334,943
Granted (in shares)	21,158	21,813	27,285
Distributed (in shares)	(32,352)	(35,489)	(30,022)
Dividend equivalents (in shares)	6,003	4,869	6,347
Balance at the end of the period (in shares)	324,555	329,746	338,553
Weighted Average Grant Date Fair Value
Balance at the beginning of the period (in dollars per share)	$ 33.05	$ 42.47	$ 38.64
Granted (in dollars per share)	56.00	49.14	39.69
Distributed (in dollars per share)	39.01	35.22	34.19
Dividend equivalents (in dollars per share)	0.00	0.00	0.00
Balance at the end of the period (in dollars per share)	$ 35.25	$ 33.05	$ 42.47