SEGMENT INFORMATION - Geographic Information (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues and long-lived assets by geographic region
Total revenues	$ 2,403	$ 2,479	$ 2,420	$ 2,372	$ 2,758	$ 2,787	$ 2,733	$ 2,169	$ 9,674	$ 10,447	$ 8,206
Long-lived assets	1,312				1,442				1,312	1,442
U.S. and Puerto Rico
Revenues and long-lived assets by geographic region
Total revenues									6,247	7,063	4,415
Long-lived assets	614				691				614	691
Canada
Revenues and long-lived assets by geographic region
Total revenues									320	334	375
Long-lived assets	83				76				83	76
China
Revenues and long-lived assets by geographic region
Total revenues									300	272	232
Long-lived assets	26				33				26	33
Japan
Revenues and long-lived assets by geographic region
Total revenues									232	206	249
Egypt
Revenues and long-lived assets by geographic region
Total revenues									196	51	5
Long-lived assets	41				97				41	97
Mexico
Revenues and long-lived assets by geographic region
Total revenues									189	204	222
Long-lived assets	50				62				50	62
France
Revenues and long-lived assets by geographic region
Total revenues									186	178	205
Long-lived assets	29				30				29	30
Australia
Revenues and long-lived assets by geographic region
Total revenues									176	182	196
Russia
Revenues and long-lived assets by geographic region
Total revenues									165	169	275
Germany
Revenues and long-lived assets by geographic region
Total revenues									157	159	204
Long-lived assets	60				63				60	63
Poland
Revenues and long-lived assets by geographic region
Total revenues									140	214	276
Long-lived assets	81				89				81	89
Brazil
Revenues and long-lived assets by geographic region
Total revenues									105	110	161
South Korea
Revenues and long-lived assets by geographic region
Long-lived assets	14				14				14	14
U.K.
Revenues and long-lived assets by geographic region
Total revenues									104	105	114
Other Europe, Asia, the Middle East, Latin America, Africa and other
Revenues and long-lived assets by geographic region
Total revenues									1,157	1,200	$ 1,277
Long-lived assets	72				106				72	106
Ireland
Revenues and long-lived assets by geographic region
Long-lived assets	198				133				198	133
Serbia
Revenues and long-lived assets by geographic region
Long-lived assets	25				27				25	27
Italy
Revenues and long-lived assets by geographic region
Long-lived assets	$ 19				$ 21				$ 19	$ 21