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COMMITMENTS AND GUARANTEES (Other and Community Development Programs) (Details) - USD ($) shares in Millions, $ in Millions |  | 1 Months Ended | 3 Months Ended | 4 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Jan. 05, 2016 | Jan. 31, 2017 | Jun. 30, 2017 | Jun. 30, 2016 | Nov. 23, 2016 | Aug. 04, 2016 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |
Total cost of sales |  |  |  |  |  |  | $ 13,445 | $ 11,980 | $ 17,534
Community Development Programs | PT-FI |  |  |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |
Total cost of sales |  |  |  |  |  |  | $ 55 | 44 | 33
Percentage of annual revenue committed for the development of the local people in the area of operations |  |  |  |  |  |  | 1.00% |  |
Ultra-deepwater Drillship Contracts [Member] |  |  |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues |  |  |  | 48.1 |  |  |  |  |
Proceeds from Issuance of Common Stock, Gross |  |  |  | $ 540 |  |  |  |  |
Rowan Companies plc [Member] | Contract Termination [Member] |  |  |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |
Loss Contingency Accrual, Payments |  | $ 6 | $ 0 |  |  |  |  |  | 215
Ultra-deepwater Drillship Contracts [Member] |  |  |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |
Unrecorded Unconditional Purchase Obligation, Change of Amount as Result of Variable Components |  |  |  |  |  |  |  | $ 1,100 |
Ultra-deepwater Drillship Contracts [Member] | Rowan Companies plc [Member] | Maximum |  |  |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |
Contingent Payments, Contract Termination |  |  |  |  |  |  |  |  | 30
Ultra-deepwater Drillship Contracts [Member] | Noble Drilling LLC [Member] | Maximum |  |  |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |
Contingent Payments, Contract Termination |  |  |  |  |  |  |  |  | $ 75
Common Stock |  |  |  |  |  |  |  |  |
Other Commitments [Line Items] |  |  |  |  |  |  |  |  |
Stock Issued During Period, Shares, New Issues | 4.3 |  |  | 48.1 | 116.5 | 27.7 |  |  | 197.0

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