PROJECT CHANGES IN ESTIMATES	3 Months Ended
Mar. 31, 2019
Accounting Policies [Abstract]
PROJECT CHANGES IN ESTIMATES	NOTE 5—PROJECT CHANGES IN ESTIMATES Our RPOs for each of our operating groups generally consist of several hundred contracts, and our results may be impacted by changes in estimated margins. The following is a discussion of our most significant changes in cost estimates that impacted segment operating income for the three months ended March 31, 2019 and 2018. For discussion of significant changes in estimates resulting from changes in transaction prices, see Note 4, Revenue Recognition. Three months ended March 31, 2019 Segment operating income for the three months ended March 31, 2019 was impacted by net favorable changes in estimates totaling approximately $19 million, primarily in our NCSA, EARC, MENA and APAC segments. NCSA—Our segment results for the three months ended March 31, 2019 were negatively impacted by net unfavorable changes in estimates aggregating approximately $24 million. The net unfavorable changes were due to cost increases on the Freeport LNG Trains 1 & 2 project and a subsea pipeline flowline installation project, partially offset by savings on our ethane projects in Texas and Louisiana and our Freeport LNG Train 3 project. See Note 4, Revenue Recognition, for further discussion of our Freeport LNG Trains 1 & 2 and Train 3 projects. EARC—Our segment results for the three months ended March 31, 2019 were positively impacted by net favorable changes in estimates aggregating approximately $4 million. MENA—Our segment results for the three months ended March 31, 2019 were positively impacted by net favorable changes in estimates aggregating approximately $33 million. The net favorable changes were primarily due to reductions in costs on various projects in the Middle East. APAC—Our segment results for the three months ended March 31, 2019 were positively impacted by net favorable changes in estimates aggregating approximately $6 million. The net favorable changes were due to reductions in cost to complete several projects, partially offset by cost increases and weather downtime on various projects. Three months ended March 31, 2018 Segment operating income for the three months ended March 31, 2018 was positively impacted by net favorable changes in estimates totaling approximately $37 million, primarily in our MENA (approximately $30 million) and APAC (approximately $9 million) segments.

PROJECT CHANGES IN ESTIMATES

3 Months Ended

Mar. 31, 2019

NOTE 5—PROJECT CHANGES IN ESTIMATES

Our RPOs for each of our operating groups generally consist of several hundred contracts, and our results may be impacted by changes in estimated margins. The following is a discussion of our most significant changes in cost estimates that impacted segment operating income for the three months ended March 31, 2019 and 2018. For discussion of significant changes in estimates resulting from changes in transaction prices, see Note 4, Revenue Recognition.

Three months ended March 31, 2019

Segment operating income for the three months ended March 31, 2019 was impacted by net favorable changes in estimates totaling approximately $19 million, primarily in our NCSA, EARC, MENA and APAC segments.

NCSA—Our segment results for the three months ended March 31, 2019 were negatively impacted by net unfavorable changes in estimates aggregating approximately $24 million. The net unfavorable changes were due to cost increases on the Freeport LNG Trains 1 & 2 project and a subsea pipeline flowline installation project, partially offset by savings on our ethane projects in Texas and Louisiana and our Freeport LNG Train 3 project. See Note 4, Revenue Recognition, for further discussion of our Freeport LNG Trains 1 & 2 and Train 3 projects.

EARC—Our segment results for the three months ended March 31, 2019 were positively impacted by net favorable changes in estimates aggregating approximately $4 million.

MENA—Our segment results for the three months ended March 31, 2019 were positively impacted by net favorable changes in estimates aggregating approximately $33 million. The net favorable changes were primarily due to reductions in costs on various projects in the Middle East.

APAC—Our segment results for the three months ended March 31, 2019 were positively impacted by net favorable changes in estimates aggregating approximately $6 million. The net favorable changes were due to reductions in cost to complete several projects, partially offset by cost increases and weather downtime on various projects.

Three months ended March 31, 2018

Segment operating income for the three months ended March 31, 2018 was positively impacted by net favorable changes in estimates totaling approximately $37 million, primarily in our MENA (approximately $30 million) and APAC (approximately $9 million) segments.