SEGMENT INFORMATION - Revenue by Geographic Area (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 2,016	$ 1,995
U.S. and Puerto Rico
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	1,200	1,176
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	89	84
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	79	77
Poland
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	58	63
Japan
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	55	51
France
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	53	55
Egypt
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	53	45
Germany
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	45	50
Mexico
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	44	43
Russia
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	36	28
United Kingdom
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	28	27
Italy
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	22	22
Spain
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	21	21
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 233	$ 253