COMMON STOCK DIVIDENDS (Details) - USD ($) $ / shares in Units, $ in Millions  | 
3 Months Ended | |
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Mar. 31, 2017  | 
Mar. 31, 2016  | 
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| DIVIDENDS ON COMMON STOCK | ||
| Cash dividends paid | $ 30 | $ 30 | 
| Cash dividends paid (in dollars per share) | $ 0.125 | $ 0.125 | 
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- Definition Aggregate dividends paid during the period for each share of common stock outstanding. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- References No definition available. 
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- Definition Amount of cash outflow in the form of ordinary dividends to common shareholders of the parent entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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