Share-Based Compensation - Summary of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Number of Awards
Exercised (in shares)	(117,049)	(96,514)	(362,571)
Stock options
Number of Awards
Balance at the beginning of the period (in shares)	2,126,289	2,223,261	2,392,428
Granted (in shares)	167,926	124,977	252,545
Exercised (in shares)	(117,049)	(96,514)	(362,571)
Forfeited (in shares)	(27,017)	(125,435)	(25,915)
Expired (in shares)	(608)		(33,226)
Balance at the end of the period (in shares)	2,149,541	2,126,289	2,223,261
Exercisable (in shares)	1,888,639
Weighted Average Exercise Price
Balance at the beginning of the period (in dollars per share)	$ 44.06	$ 42.88	$ 42.27
Granted (in dollars per share)	44.75	57.92	41.27
Exercised (in dollars per share)	36.37	39.93	35.70
Forfeited (in dollars per share)	46.62	40.17	45.27
Expired (in dollars per share)	30.69		63.12
Balance at the end of the period (in dollars per share)	44.50	$ 44.06	$ 42.88
Exercisable (in dollars per share)	$ 44.19
Weighted Average Remaining Contractual Term
Outstanding	5 years 6 months
Exercisable	5 years
Aggregate Intrinsic Value ($ in millions)
Outstanding	$ 0.0
Exercisable	$ 0.0