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COMMITMENTS AND CONTINGENCIES (Narrative) (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2015
USD ($)
Years
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Debt Instrument [Line Items]      
2016 $ 182    
2017 138    
2018 94    
2019 67    
2020 44    
2021 and thereafter 152    
Minimum lease payments 677    
Operating leases, rent expense 224 $ 242 $ 223
Total noncancelable future purchase commitments 206    
Noncancelable future purchase commitments, to be incurred in 2016 96    
Noncancelable future purchase commitments, to be incurred in 2017 and 2018 $ 84    
Remaining terms of lease obligations, minimum | Years 8    
Remaining terms of lease obligations, maximum | Years 32    
Litigation reserves $ 9 11  
Self-insurance reserves 124 $ 113  
Noncancellable future purchase commitments, to be incurred thereafter 26    
Letter of Credit [Member]      
Debt Instrument [Line Items]      
Letters of credit outstanding, amount $ 67