Quarterly report pursuant to Section 13 or 15(d)

SHAREHOLDERS' EQUITY (Details)

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SHAREHOLDERS' EQUITY (Details) - USD ($)
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Mar. 11, 2015
Equity, Class of Treasury Stock [Line Items]      
Depositary shares issued (in shares) 16,000,000    
Purchase of common stock shares   4,900,000  
Purchase of common stock, average price per share (in usd per share)   $ 10.45  
2015 Share Repurchase Program      
Equity, Class of Treasury Stock [Line Items]      
Stock repurchase program authorized amount     $ 366,000,000
Series D Preferred Stock      
Equity, Class of Treasury Stock [Line Items]      
Preferred stock $ 400,000,000    
Preferred Stock, fixed rate 6.25%    
Preferred Stock, par value (in dollars per share) $ 0.01    
Preferred Stock, liquidation value per share (in dollars per share) 1,000    
Depositary shares, liquidation value per share (in dollars per share) $ 25    
Stock issuance costs $ 14,000,000    
Preferred stock redemption period 90 days