Earnings Per Share Earnings Per Share - Additional Details (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2020	Mar. 31, 2019	Jun. 30, 2019
Earnings Per Share [Abstract]
Common Stock, Par or Stated Value Per Share	$ 0.01		$ 0.01		$ 0.01
If-converted Shares, Common Stock			13.1
Potential common shares issuable, Restricted & Employee held	$ 0.5	$ 1.1	$ 0.6	$ 1.0