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BASIS OF PREPARATION (Details) - USD ($)
$ in Millions
1 Months Ended
Sep. 27, 2016
Aug. 22, 2016
Aug. 12, 2016
Aug. 09, 2016
Aug. 08, 2016
Sep. 30, 2016
Aug. 31, 2016
Oct. 31, 2015
Feb. 19, 2015
Debt Instrument [Line Items]                  
Stated interest rate (percent)               1.15%  
Stock issued in September (shares) 15,000,000                
Proceeds from issuance of common stock, net $ 135.2         $ 135.2      
Convertible Notes | 6.00% Convertible Senior Notes due 2020                  
Debt Instrument [Line Items]                  
Stated interest rate (percent)             6.00%   6.00%
Payment on 6% Notes         $ 4.7   $ 4.7    
Common Stock                  
Debt Instrument [Line Items]                  
Shares issued in settlement of debt (shares)   756,213 21,852,477 20,564,101 12,051,282   34,659,972    
Stock issued in September (shares)           17,250,000