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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, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Revenues by geographic area of customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues | $ 3,684 | $ 4,908 | $ 5,168 | $ 4,868 | $ 5,041 | $ 4,310 | $ 3,711 | $ 3,341 | $ 18,628 | $ 16,403 | $ 14,830
U.S. |  |  |  |  |  |  |  |  |  |  |
Revenues by geographic area of customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 5,790 | 5,344 | 5,896
Indonesia |  |  |  |  |  |  |  |  |  |  |
Revenues by geographic area of customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 2,226 | 2,023 | 1,402
Japan |  |  |  |  |  |  |  |  |  |  |
Revenues by geographic area of customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 1,946 | 1,882 | 1,350
Switzerland |  |  |  |  |  |  |  |  |  |  |
Revenues by geographic area of customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 2,941 | 1,200 | 1,147
China |  |  |  |  |  |  |  |  |  |  |
Revenues by geographic area of customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 873 | 1,136 | 1,125
Spain |  |  |  |  |  |  |  |  |  |  |
Revenues by geographic area of customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 1,070 | 1,086 | 878
India |  |  |  |  |  |  |  |  |  |  |
Revenues by geographic area of customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 389 | 782 | 553
PHILIPPINES |  |  |  |  |  |  |  |  |  |  |
Revenues by geographic area of customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 221 | 378 | 261
Korea |  |  |  |  |  |  |  |  |  |  |
Revenues by geographic area of customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 269 | 364 | 219
GERMANY |  |  |  |  |  |  |  |  |  |  |
Revenues by geographic area of customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 256 | 161 | 162
FRANCE |  |  |  |  |  |  |  |  |  |  |
Revenues by geographic area of customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 255 | 122 | 80
Chile |  |  |  |  |  |  |  |  |  |  |
Revenues by geographic area of customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 294 | 248 | 250
BELGIUM |  |  |  |  |  |  |  |  |  |  |
Revenues by geographic area of customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 278 | 39 | 87
BERMUDA |  |  |  |  |  |  |  |  |  |  |
Revenues by geographic area of customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 207 | 226 | 273
UNITED KINGDOM |  |  |  |  |  |  |  |  |  |  |
Revenues by geographic area of customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 296 | 226 | 204
Other |  |  |  |  |  |  |  |  |  |  |
Revenues by geographic area of customer [Line Items] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | $ 1,317 | $ 1,186 | $ 943

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