Revenues (Tables)

3 Months Ended

Mar. 31, 2019

Revenue from Contract with Customer [Abstract]

The following tables disaggregate our product and service revenues from contracts with customers by major product line and geographic region for the first quarter ended March 31, 2019 and 2018:



	Three Months Ended March 31, 2019
(Dollars in millions)	Western Hemisphere		Eastern Hemisphere		Total Revenues Excluding Rental Revenues
Product Lines:
Production	$	295	$	96	$	391
Completions	133		172		305
Drilling and Evaluation	142		184		326
Well Construction	99		147		246
Total	$	669	$	599	$	1,268



	Three Months Ended March 31, 2018
(Dollars in millions)	Western Hemisphere		Eastern Hemisphere		Total Revenues Excluding Rental Revenues
Product Lines:
Production	$	286	$	95	$	381
Completions	157		136		293
Drilling and Evaluation	156		194		350
Well Construction	101		216		317
Total	$	700	$	641	$	1,341



	Three Months Ended March 31,
(Dollars in millions)	2019		2018
Geographic Areas:
United States	$	329	$	345
Latin America	258		226
Canada	82		129
Western Hemisphere	669		700

Middle East & North Africa	308		362
Europe/Sub-Sahara Africa/Russia	216		214
Asia	75		65
Eastern Hemisphere	599		641

Total Product and Service Revenue before Rental Revenues	1,268		1,341
Equipment Rental Revenues	78		82
Total Revenues	$	1,346	$	1,423

Schedule of Contract with Customer, Asset and Liability

Contract Balances

The following table provides information about receivables for product and services included in “Accounts Receivable, Net” at March 31, 2019 and December 31, 2018, respectively.

Significant changes in the contract assets and liabilities balances during the period are as follows:



(Dollars in millions)	Contract Assets			Contract Liabilities
Balance at December 31, 2018	$	4		$	64
Revenue recognized that was included in the deferred revenue balance at the beginning of the period	—			(83		)
Increase due to cash received, excluding amount recognized as revenue during the period	—			75
Increase due to revenue recognized during the period but contingent on future performance	10			—
Transferred to receivables from contract assets recognized at the beginning of the period	(2		)	—
Changes as a result of adjustments due to changes in estimates or contract modifications	—			3
Balance at March 31, 2019	$	12		$	59

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 March 31, 2019 primarily relate to subsea services and an artificial lift contract. All consideration from contracts with customers is included in the amounts presented in the following table.



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

(Dollars in millions)

March 31, 2019

December 31, 2018

Receivables for Product and Services in Accounts Receivable, Net