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GOODWILL AND OTHER INTANGIBLE ASSETS Additional Information (Details)
3 Months Ended 12 Months Ended
Sep. 30, 2017
USD ($)
reporting_units
Dec. 31, 2017
USD ($)
Dec. 31, 2016
USD ($)
Dec. 31, 2015
USD ($)
Segment Reporting Information [Line Items]        
Goodwill and intangible assets   $ 1,100,000,000 $ 1,100,000,000  
Goodwill and intangible assets, percent of total assets   19.00% 20.00%  
Number of reporting units, operating performance below expectations | reporting_units 2      
Impairment of goodwill or indefinitely-lived intangible assets $ 0      
Amortization expense, intangible assets   $ 89,000,000 $ 82,000,000 $ 65,000,000
Canada        
Segment Reporting Information [Line Items]        
Reporting unit, percentage of fair value in excess of carrying amount 31.00%      
Other Businesses [Member]        
Segment Reporting Information [Line Items]        
Reporting unit, percentage of fair value in excess of carrying amount 15.00%