Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions		12 Months Ended
		Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenue:
Revenue		$ 23,995	$ 20,620	$ 15,887
Operating costs and expenses:
Merger-related costs and termination fee		0	0	4,057
Impairments and other charges	[1]	265	647	3,357
General and administrative		254	256	226
Total operating costs and expenses		21,528	19,246	22,657
Operating income (loss)		2,467	1,374	(6,770)
Interest expense, net of interest income		(554)	(593)	(639)
Other, net		(99)	(99)	(216)
Income (loss) from continuing operations before income taxes		1,814	682	(7,625)
Income tax benefit (provision)		(157)	(1,131)	1,858
Income (loss) from continuing operations		1,657	(449)	(5,767)
Loss from discontinued operations, net		0	(19)	(2)
Net income (loss)		1,657	(468)	(5,769)
Net (income) loss attributable to noncontrolling interest		(1)	5	6
Net income (loss) attributable to company		1,656	(463)	(5,763)
Amounts attributable to company shareholders:
Income (loss) from continuing operations		1,656	(444)	(5,761)
Loss from discontinued operations, net		0	(19)	(2)
Net income (loss) attributable to company		$ 1,656	$ (463)	$ (5,763)
Basic and diluted loss per share attributable to company shareholders:
Income (loss) from continuing operations (in dollars per share)		$ 1.89	$ (0.51)	$ (6.69)
Loss from discontinued operations, net (in dollars per share)		0	(0.02)	0
Net income (loss) per share (in dollars per share)		$ 1.89	$ (0.53)	$ (6.69)
Basic weighted average common shares outstanding		875	870	861
Diluted weighted average common shares outstanding		877	870	861
Services [Member]
Revenue:
Revenue		$ 18,444	$ 15,408	$ 11,140
Operating costs and expenses:
Cost of services and sales		16,591	14,205	11,249
Product sales [Member]
Revenue:
Revenue		5,551	5,212	4,747
Operating costs and expenses:
Cost of services and sales		$ 4,418	$ 4,138	$ 3,768

[1] Impairments and other charges are as follows: -For the year ended December 31, 2018, the aggregate charge of $265 million represents a write-down of all of our remaining investment in Venezuela, consisting of receivables, fixed assets, inventory and other assets and liabilities. -For the year ended December 31, 2017, the aggregate charge of $647 million represents a fair market value adjustment on our existing promissory note with our primary customer in Venezuela and a full reserve against our other accounts receivable with this customer. -For the year ended December 31, 2016, the aggregate charge of $3.4 billion consisted of fixed asset impairments and write-offs, inventory write-downs, impairments of intangible assets, severance costs, country and facility closures, and other charges related to the energy downturn. This included $2.1 billion attributable to Completion and Production, $1.2 billion attributable to Drilling and Evaluation and $10 million attributable to Corporate and other.