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Business Segment and Geographic Information (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Revenue:        
Revenue $ 6,172 $ 5,444 $ 18,059 $ 14,680
Operating income (loss):        
Impairments and other charges 0 0 (265) [1] (262) [1]
Operating income 716 642 1,859 991
Interest expense, net of interest income (140) (115) (417) (478) [2]
Other, net (42) (31) (86) (75)
Income (loss) from continuing operations before income taxes 534 496 1,356 438
Gain (Loss) on Extinguishment of Debt       104
Early Repayment of Senior Debt       1,400
Completion and Production        
Revenue:        
Revenue 4,170 3,537 12,141 9,273
Operating income (loss):        
Operating income 613 527 1,782 1,071
Drilling and Evaluation        
Revenue:        
Revenue 2,002 1,907 5,918 5,407
Operating income (loss):        
Operating income 181 186 560 433
Total operations        
Revenue:        
Revenue 6,172 5,444 18,059 14,680
Operating income (loss):        
Operating income 794 713 2,342 1,504
Corporate and other        
Operating income (loss):        
Operating income [3] $ (78) $ (71) $ (218) $ (251)
[1] Represents a pre-tax charge of $265 million related to a write-down of all of our remaining investment in Venezuela, consisting of receivables, fixed assets, inventory and other assets and liabilities during the nine months ended September 30, 2018 and $262 million for a fair market value adjustment related to Venezuela during the nine months ended September 30, 2017.
[2] Includes $104 million of costs related to the early extinguishment of $1.4 billion of senior notes in the nine months ended September 30, 2017.
[3] Corporate and other includes certain expenses not attributable to a particular business segment, such as costs related to support functions and corporate executives, and amortization expense associated with intangible assets recorded as a result of acquisitions.