Revenues (Tables)

12 Months Ended

Dec. 31, 2018

Disaggregation of Revenue [Line Items]

Schedule of Disaggregation of Revenue

The following tables disaggregate our product and service revenues from contracts with customers by major product line and geographic region for year ended December 31, 2018:

	Year Ended December 31, 2018
(Dollars in millions)	Western Hemisphere		Eastern Hemisphere		Total Excluding Rental Revenues
Product Lines:
Production	$	1,176	$	342	$	1,518
Completions	609		604		1,213
Drilling and Evaluation	612		778		1,390
Well Construction	429		857		1,286
Total	$	2,826	$	2,581	$	5,407

	Year Ended December 31, 2018
(Dollars in millions)
Geographic Areas:
United States	$	1,435
Latin America	1,017
Canada	374
Western Hemisphere	2,826
Middle East & North Africa	1,376
Europe/Sub-Sahara Africa/Russia	920
Asia	285
Eastern Hemisphere	2,581
Total Product and Service Revenue before Rental Revenues	5,407
Rental Revenues	337
Total Revenues	$	5,744

Schedule of Contract with Customer, Asset and Liability

(Dollars in millions)	Contract Assets			Contract Liabilities
Balance at January 1, 2018	$	10		$	42
Revenue recognized that was included in the deferred revenue balance at the beginning of the period	—			(112		)
Increase due to cash received, excluding amount recognized as revenue during the period	—			120
Increase due to revenue recognized during the period but contingent on future performance	14			—
Transferred to receivables from contract assets recognized at the beginning of the period	(13		)	—
Changes as a result of adjustments due to changes in estimates or contract modifications	—			21
Impairment of contract assets	(5		)	—
Reclassification to held for sale and sold	(2		)	(7		)
Balance at December 31, 2018	$	4		$	64

The following table provides information about receivables for product and services included in “Accounts Receivable, Net”

at December 31, 2018 and January 1, 2018, respectively:

(Dollars in millions)	December 31, 2018		January 1, 2018
Receivables for Product and Services in Accounts Receivable, Net	$	1,051	$	1,081

Schedule of Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction

In the following table, estimated revenue expected to be recognized in the future related to performance obligations that are either unsatisfied or partially unsatisfied as of December 31, 2018 primarily relate to subsea services and an artificial lift contract:

(Dollars in millions)	2019		2020		2021		2022		Thereafter		Total
Service revenue	$	57	$	33	$	18	$	18	$	19	$	145