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Segment Information - Schedule of Segment Reporting Information, by Segment (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Segment Reporting Information [Line Items]      
Revenue $ 32,815 $ 30,440 $ 27,810
Income Before Taxes 2,624 (1,183) (1,905)
Assets 70,507 71,987 77,956
Depreciation and Amortization [1] 3,556 3,837 4,094
Capital Expenditures 2,160 2,107 2,055
Pretax operating income 4,187 3,921 3,273
Interest expense 575 566 570
Charges & credits 141 3,764 3,820
Reservoir Characterization      
Segment Reporting Information [Line Items]      
Revenue 6,526    
Drilling      
Segment Reporting Information [Line Items]      
Revenue 9,250    
Production      
Segment Reporting Information [Line Items]      
Revenue 12,394    
Cameron      
Segment Reporting Information [Line Items]      
Revenue 5,167    
Operating Segments      
Segment Reporting Information [Line Items]      
Revenue 32,815 30,440 27,810
Interest income 8 21 26
Interest expense 38 53 53
Operating Segments | Reservoir Characterization      
Segment Reporting Information [Line Items]      
Revenue 6,526 6,795 6,660
Income Before Taxes 1,392 1,244 1,244
Assets 4,477 4,892 6,890
Depreciation and Amortization 673 989 1,156
Capital Expenditures 302 305 532
Operating Segments | Drilling      
Segment Reporting Information [Line Items]      
Revenue 9,250 8,392 8,561
Income Before Taxes 1,239 1,151 994
Assets 5,843 5,513 6,803
Depreciation and Amortization 597 697 881
Capital Expenditures 718 629 425
Operating Segments | Production      
Segment Reporting Information [Line Items]      
Revenue 12,394 10,630 8,792
Income Before Taxes 1,052 936 512
Assets 12,625 12,450 10,497
Depreciation and Amortization 1,417 1,240 1,231
Capital Expenditures 886 889 655
Operating Segments | Cameron      
Segment Reporting Information [Line Items]      
Revenue 5,167 5,205 4,211
Income Before Taxes 608 733 653
Assets 3,967 3,978 4,246
Depreciation and Amortization 241 260 208
Capital Expenditures 146 150 176
Eliminations & other      
Segment Reporting Information [Line Items]      
Revenue (522) (582) (414)
Income Before Taxes (104) (143) (130)
Assets 1,460 1,665 1,528
Depreciation and Amortization 189 213 234
Capital Expenditures 108 134 267
Goodwill and intangible assets 33,658 34,472 34,845
Cash and short term investments 2,777 5,089  
Cash, short term investments and fixed income investments     9,495
All other assets 5,700 3,928 3,652
Corporate & other [2] (937) (934) (925)
Interest income [3] 52 107 84
Interest expense [4] (537) (513) (517)
Charges & credits [5] (141) (3,764) (3,820)
Eliminations & other | Corporate and Other      
Segment Reporting Information [Line Items]      
Depreciation and Amortization [2] $ 439 $ 438 $ 384
[1] Includes depreciation of property, plant and equipment and amortization of intangible assets, multiclient seismic data costs and SPM investments.
[2] Comprised principally of certain corporate expenses not allocated to the segments, stock-based compensation costs, amortization expense associated with certain intangible assets (including intangible asset amortization expense resulting from the 2016 acquisition of Cameron), certain centrally managed initiatives and other nonoperating items.
[3] Interest income excludes amounts which are included in the segments’ income (2018: $8 million; 2017: $21 million; 2016: $26 million).
[4] Interest expense excludes amounts which are included in the segments’ income (2018: $38 million; 2017: $53 million; 2016: $53 million).
[5] See Note 3 – Charges and Credits.