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EMPLOYEE BENEFITS - Narrative (Details) (USD $)
In Millions, unless otherwise specified
1 Months Ended 9 Months Ended
Sep. 30, 2014
RBS
Sep. 30, 2014
Qualified Plan
Sep. 30, 2014
Non-Qualified Plan
Sep. 30, 2014
Other Postretirement Benefit Plan
Sep. 30, 2014
Other Postretirement Benefit Plan
25 or more years of service
Sep. 30, 2014
Other Postretirement Benefit Plan
15-24 years of service
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]            
Assets transferred to Affiliate plans   $ 114        
Liabilities transferred to Affiliate plans   148 7 7    
Cost sharing benefit (as a percentage)         70.00% 50.00%
Cash liability $ 18