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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, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Revenues by geographic area of customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 5,041 | $ 4,310 | $ 3,711 | $ 3,341 | $ 4,377 | $ 3,877 | $ 3,334 | $ 3,242 | $ 16,403 | $ 14,830 | $ 14,607
U.S. |  |  |  |  |  |  |  |  |  |  |
Revenues by geographic area of customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 5,344 | 5,896 | 6,842
Indonesia |  |  |  |  |  |  |  |  |  |  |
Revenues by geographic area of customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 2,023 | 1,402 | 1,054
Japan |  |  |  |  |  |  |  |  |  |  |
Revenues by geographic area of customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 1,882 | 1,350 | 1,246
Switzerland |  |  |  |  |  |  |  |  |  |  |
Revenues by geographic area of customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 1,200 | 1,147 | 618
China |  |  |  |  |  |  |  |  |  |  |
Revenues by geographic area of customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 1,136 | 1,125 | 688
Spain |  |  |  |  |  |  |  |  |  |  |
Revenues by geographic area of customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 1,086 | 878 | 960
India |  |  |  |  |  |  |  |  |  |  |
Revenues by geographic area of customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 782 | 553 | 532
PHILIPPINES |  |  |  |  |  |  |  |  |  |  |
Revenues by geographic area of customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 378 | 261 | 169
Korea |  |  |  |  |  |  |  |  |  |  |
Revenues by geographic area of customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 364 | 219 | 177
Chile |  |  |  |  |  |  |  |  |  |  |
Revenues by geographic area of customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 248 | 250 | 397
BERMUDA |  |  |  |  |  |  |  |  |  |  |
Revenues by geographic area of customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 226 | 273 | 159
UNITED KINGDOM |  |  |  |  |  |  |  |  |  |  |
Revenues by geographic area of customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 226 | 204 | 83
Other |  |  |  |  |  |  |  |  |  |  |
Revenues by geographic area of customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | $ 1,508 | $ 1,272 | $ 1,682

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