Earnings (Loss) Per Share - Potentially Dilutive Securities (Details) - shares
7 Months Ended 12 Months Ended
Jun. 30, 2015
Feb. 01, 2015
Jun. 30, 2017
Jun. 30, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Stock options excluded from EPS 8,362,688   2,387,226 8,836,288
Stock Options [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Stock options excluded from EPS 5,074,188   2,069,551 5,301,576
Performance Shares [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Stock options excluded from EPS 3,288,500   317,675 3,534,712
Predecessor [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Stock options excluded from EPS   64,811,805    
Predecessor [Member] | Stock Options [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Stock options excluded from EPS   64,811,805    
Predecessor [Member] | Performance Shares [Member]        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Stock options excluded from EPS   0