Impairment and Other Charges (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2019
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Restructuring Cost and Reserve [Line Items]        
Long-lived asset impairments   $ 1,603    
Inventory costs and write-downs   458    
Severance   172    
Joint ventures   154    
Other   119    
Total impairments and other charges [1]   $ 2,506 $ 265 $ 647
North America land rig count decline during 2019   26.00%    
North America land rig count decline in Q4 2019 9.00%      
Impairments and other charges   $ 2,506 265 647
Impairment of hydraulic fracturing equipment   759    
Impairment of legacy drilling equipment   243    
Impairment of real estate facilities   215    
Impairment of right-of-use assets associated with operating leases   139    
Impairment of intangible assets   98    
Impairment of other fixed assets   148    
Completion and Production        
Restructuring Cost and Reserve [Line Items]        
Impairments and other charges   1,600    
Drilling and Evaluation        
Restructuring Cost and Reserve [Line Items]        
Impairments and other charges   $ 849    
VENEZUELA        
Restructuring Cost and Reserve [Line Items]        
Venezuela investment write-down     265 647
Total impairments and other charges [1]     $ 265 $ 647
[1] Impairments and other charges are as follows:
-For the year ended December 31, 2019, amount includes approximately $1.6 billion attributable to Completion and Production, $849 million attributable to Drilling and Evaluation, and $56 million attributable to Corporate and other.
-For the years ended December 31, 2018 and December 31, 2017, we recorded aggregate charges of $265 million and $647 million, respectively, to write-down our investment in Venezuela.