Quarterly report pursuant to Section 13 or 15(d)

SHAREHOLDERS' EQUITY (Details)

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SHAREHOLDERS' EQUITY (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Stockholders' Equity Note [Abstract]        
Purchase of common stock shares 6.8 5.4 20.5 32.1
Purchase of common stock, average price per share (in usd per share) $ 10.66 $ 9.70 $ 10.76 $ 9.34
Stock repurchase program authorized amount $ 366   $ 366