SEGMENT INFORMATION - Geographical Information, Long-Lived Assets (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Revenues and long-lived assets by geographic region
Long-lived assets	$ 1,466	$ 1,353
U.S. and Puerto Rico
Revenues and long-lived assets by geographic region
Long-lived assets	656	593
Ireland
Revenues and long-lived assets by geographic region
Long-lived assets	255	217
Canada
Revenues and long-lived assets by geographic region
Long-lived assets	103	99
Poland
Revenues and long-lived assets by geographic region
Long-lived assets	90	94
Germany
Revenues and long-lived assets by geographic region
Long-lived assets	68	66
Egypt
Revenues and long-lived assets by geographic region
Long-lived assets	62	50
Mexico
Revenues and long-lived assets by geographic region
Long-lived assets	50	48
France
Revenues and long-lived assets by geographic region
Long-lived assets	30	31
China
Revenues and long-lived assets by geographic region
Long-lived assets	27	25
Serbia
Revenues and long-lived assets by geographic region
Long-lived assets	27	28
Italy
Revenues and long-lived assets by geographic region
Long-lived assets	22	23
Other
Revenues and long-lived assets by geographic region
Long-lived assets	$ 76	$ 79