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INCOME TAXES (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Income Tax Examination [Line Items]          
Effective tax rate 24.40% 23.50% 24.90% 24.20%  
Deferred tax assets $ 580   $ 580   $ 591
ITALY          
Income Tax Examination [Line Items]          
Deferred tax assets         $ 700