Share-Based Compensation - Restricted Shares (Details) - Restricted Shares - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Shares outstanding beginning period (in shares)	231	250	246
Shares granted (in shares)	156	60	189
Shares vested (in shares)	(88)	(40)	(75)
Shares forfeited (in shares)	(22)	(39)	(110)
Shares outstanding ending period (in shares)	277	231	250
Vested shares (in shares)	0	0	0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Weighted average grant date fair value, beginning period (dollars per share)	$ 6.24	$ 9.36	$ 17.25
Weighted average grant date fair value, granted (dollars per share)	5.81	5.94	5.57
Weighted average grant date fair value, vested and issued (dollars per share)	8.31	15.64	16.57
Weighted average grant date fair value, forfeited (dollars per share)	10.70	16.21	15.54
Weighted average grant date fair value, ending period (dollars per share)	4.98	6.24	9.36
Weighted average granted date fair value, vested shares (dollars per share)	$ 0.00	$ 0.00	$ 0.00
Fair value of vested awards	$ 0.7	$ 0.4	$ 0.6