BUSINESS SEGMENTS INFORMATION (Revenues by Geographic Area of Customer) (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 by geographic area of customer [Line Items]
Revenues	$ 4,377	$ 3,877	$ 3,334	$ 3,242	$ 3,516	$ 3,382	$ 3,938	$ 3,771	$ 14,830	$ 14,607	$ 20,001
UNITED KINGDOM
Revenues by geographic area of customer [Line Items]
Revenues									204	83	142
U.S.
Revenues by geographic area of customer [Line Items]
Revenues									5,896	6,842	10,307
Japan
Revenues by geographic area of customer [Line Items]
Revenues									1,350	1,246	1,573
Indonesia
Revenues by geographic area of customer [Line Items]
Revenues									1,402	1,054	1,792
Spain
Revenues by geographic area of customer [Line Items]
Revenues									878	960	1,020
China
Revenues by geographic area of customer [Line Items]
Revenues									1,125	688	790
Switzerland
Revenues by geographic area of customer [Line Items]
Revenues									1,147	618	658
India
Revenues by geographic area of customer [Line Items]
Revenues									553	532	286
BERMUDA
Revenues by geographic area of customer [Line Items]
Revenues									273	159	76
PHILIPPINES
Revenues by geographic area of customer [Line Items]
Revenues									261	169	0
Chile
Revenues by geographic area of customer [Line Items]
Revenues									250	397	687
Korea
Revenues by geographic area of customer [Line Items]
Revenues									219	177	203
Other
Revenues by geographic area of customer [Line Items]
Revenues									$ 1,272	$ 1,682	$ 2,467