Share-Based Compensation - Performance Thresholds (Details)	Jun. 30, 2019	Jun. 30, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RMS Relative Market Performance, High Level	75.00%
RMS Relative Market Performance, Target Level	55.00%
RMS Relative Market Performance, Threshold Level	33.00%
RMS Relative Market Performance, Below Threshold Level	30.00%
Market-Based Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Market Performance Vesting Percentage, High Level	200.00%
Market Performance Vesting Percentage, Target Level	100.00%
Market Performance Vesting Percentage, Threshold Level	50.00%
Market Performance Vesting Percentage, Below Threshold Level	0.00%
TSR, Maximum		12.00%
Market Performance Percentage, Maximum		150.00%
TSR, Target		10.00%
Market Performance Percentage, Target		100.00%
TSR, Minimum		8.00%
Market Performance Percentage, Minimum		50.00%