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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