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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

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