Share-Based Compensation - Summary of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Number of Awards
Exercised (in shares)	(96,514)	(362,571)	(95,089)
Stock options
Number of Awards
Balance at the beginning of the period (in shares)	2,223,261	2,392,428	1,701,502
Granted (in shares)	124,977	252,545	907,141
Exercised (in shares)	(96,514)	(362,571)	(95,289)
Forfeited (in shares)	(125,435)	(25,915)	(80,926)
Expired (in shares)		(33,226)	(40,000)
Balance at the end of the period (in shares)	2,126,289	2,223,261	2,392,428
Number of awards, exercisable (in shares)	1,258,605
Weighted Average Exercise Price
Balance at the beginning of the period (in dollars per share)	$ 42.88	$ 42.27	$ 43.35
Granted (in dollars per share)	57.92	41.27	38.98
Exercised (in dollars per share)	39.93	35.70	23.21
Forfeited (in dollars per share)	40.17	45.27	44.35
Expired (in dollars per share)		63.12	55.12
Balance at the end of the period (in dollars per share)	44.06	$ 42.88	$ 42.27
Weighted Average Exercise Price, Exercisable (in dollars per share)	$ 45.66
Additional disclosures
Weighted Average Remaining Contractual Term	6 years 1 month
Weighted Average Remaining Contractual Term, Exercisable	5 years 1 month
Aggregate Intrinsic Value	$ 12.4
Aggregate Intrinsic Value, Exercisable	$ 5.8