XML 151 R130.htm IDEA: XBRL DOCUMENT v3.8.0.1
Stockholders' Equity Textuals (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 2 Months Ended 4 Months Ended 9 Months Ended
Aug. 23, 2017
Feb. 19, 2018
Dec. 31, 2017
Dec. 31, 2017
Aug. 01, 2017
Apr. 01, 2017
Dec. 31, 2016
Class of Stock [Line Items]              
Treasury stock, shares, acquired       5.8      
Predecessor              
Class of Stock [Line Items]              
Treasury Stock, shares             0.8
Predecessor | Common Stock              
Class of Stock [Line Items]              
Common Stock, Shares Authorized             53.3
Predecessor | Preferred Stock              
Class of Stock [Line Items]              
Preferred Stock, shares authorized             10.0
Preferred Stock, shares outstanding             0.0
Preferred Stock, Par or Stated Value Per Share             $ 0.01
Predecessor | Series Common Stock [Member]              
Class of Stock [Line Items]              
Common Stock, Shares Authorized             40.0
Predecessor | Perpetual Preferred Stock [Member]              
Class of Stock [Line Items]              
Preferred Stock, shares authorized             0.8
Preferred Stock, shares outstanding             0.0
Successor              
Class of Stock [Line Items]              
Preferred Stock, shares outstanding     13.5 13.5   30.0  
Treasury Stock, shares     5.8 5.8      
Shares Relinquished, Shares       (0.1)      
Stock Repurchase Program, Authorized Amount         $ 500.0    
Treasury stock, shares, acquired 1.5   4.3        
Treasury stock, value, acquired $ 40.0   $ 135.7 $ 175.7      
Successor | Common Stock              
Class of Stock [Line Items]              
Common Stock, Shares Authorized     450.0 450.0      
Successor | Preferred Stock              
Class of Stock [Line Items]              
Preferred Stock, shares authorized     50.0 50.0      
Preferred Stock, shares outstanding     0.0 0.0      
Preferred Stock, Par or Stated Value Per Share     $ 0.01 $ 0.01      
Successor | Series Common Stock [Member]              
Class of Stock [Line Items]              
Common Stock, Shares Authorized     50.0 50.0      
Subsequent Event [Member]              
Class of Stock [Line Items]              
Treasury stock, shares, acquired   0.9          
Treasury stock, value, acquired   $ 38.5