Annual report pursuant to Section 13 and 15(d)

SHAREHOLDERS' EQUITY - Preferred Stock Issued and Outstanding (Details)

v3.3.1.900
SHAREHOLDERS' EQUITY - Preferred Stock Issued and Outstanding (Details)
$ / shares in Units, $ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2015
$ / shares
shares
Dec. 31, 2015
$ / shares
Dec. 31, 2014
$ / shares
Dec. 31, 2011
USD ($)
$ / shares
Dec. 31, 2008
day
$ / shares
shares
Class of Stock [Line Items]          
Shares exchanged | $       $ 36  
Series A Preferred Stock          
Class of Stock [Line Items]          
Stock issued (in shares) | shares         569,000
Preferred stock, dividend percentage   8.50% 8.50%   8.50%
Preferred stock, liquidation preference per share (in dollars per share) | $ / shares $ 1,000 $ 1,000 $ 1,000   $ 1,000
Number of shares issued for each share of convertible preferred stock | shares         83.668
Conversion price (in dollars per share) | $ / shares         $ 11.95
Convertible preferred stock, threshold percentage of stock price trigger         130.00%
Convertible preferred stock, threshold trading days | day         20
Convertible preferred stock, threshold consecutive trading days         30 days
Convertible preferred stock, shares converted | shares 1        
Series B Preferred Stock          
Class of Stock [Line Items]          
Stock issued value | $       $ 24  
Preferred stock, liquidation preference per share (in dollars per share) | $ / shares $ 1,000 $ 1,000 $ 1,000 $ 1,000  
Shares issued par value | $       $ 36  
Depository share, percent interest in preferred stock       0.025  
Series B Preferred Stock | Three-month LIBOR          
Class of Stock [Line Items]          
Preferred stock, dividend percentage, basis spread on variable rate       2.70%