SEGMENT INFORMATION - Revenue by Geographic Area (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 2,012	$ 2,016
U.S. and Puerto Rico
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	1,211	1,200
Canada
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	90	79
Poland
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	73	62
Egypt
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	58	53
China
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	58	89
Japan
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	54	55
France
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	47	53
Germany
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	44	45
Mexico
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	41	46
Russia
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	34	36
United Kingdom
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	23	29
Spain
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	20	21
Italy
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	20	22
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenues	$ 239	$ 226