Business Segment and Geographic Information (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Revenue:        
Revenue $ 5,444 $ 3,833 $ 14,680 $ 11,866
Operating income (loss):        
Operating income (loss) 634 128 983 (6,831)
Impairments and other charges 0 0 (262) (3,189)
Interest expense, net of interest income (115) (141) (478) (502)
Other, net (23) (39) (67) (117)
Income (loss) from continuing operations before income taxes 496 (52) 438 (7,450)
Completion and Production        
Revenue:        
Revenue 3,537 2,176 9,273 6,614
Operating income (loss):        
Operating income (loss) 525 24 1,069 22
Drilling and Evaluation        
Revenue:        
Revenue 1,907 1,657 5,407 5,252
Operating income (loss):        
Operating income (loss) 180 151 427 546
Total operations        
Revenue:        
Revenue 5,444 3,833 14,680 11,866
Operating income (loss):        
Operating income (loss) 705 175 1,496 568
Corporate and other        
Operating income (loss):        
Operating income (loss) [1] $ (71) $ (47) $ (251) $ (4,210)
[1] Corporate and other includes certain expenses not attributable to a particular business segment such as costs related to support functions and corporate executives. Other items include amortization expense associated with intangible assets recorded as a result of our acquisitions in the third quarter of 2017 and merger-related costs and termination fee incurred during the nine months ended September 30, 2016.