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CHARGES FOR INTEGRATION AND RESTRUCTURING, CLOSURES AND ASSET IMPAIRMENTS - Changes in Accrued Severance Related to Restructuring (Details)
$ in Millions
12 Months Ended
Dec. 31, 2017
USD ($)
Restructuring Costs and Asset Impairment Charges [Abstract]  
Accrued severance as of December 31, 2016 $ 26
Charges 14
Payments (21)
Accrued severance as of December 31, 2017 $ 19