	March 31, 2019				December 31, 2018
	(Dollars in millions)
NCSA	$	8,581	56	%	$	5,649	52	%
EARC		1,914	12	%		1,378	12	%
MENA		2,879	19	%		1,834	17	%
APAC		1,401	9	%		1,420	13	%
Technology		601	4	%		632	6	%
Total	$	15,376	100	%	$	10,913	100	%

Our revenue by product offering, contract types and revenue recognition methodology was as follows:

	Three Months Ended March 31,
	2019 ⁽²⁾		2018 ⁽²⁾
	(In millions)
Revenue by product offering:
Offshore and subsea	$	605	$	608
LNG		421		-
Downstream ⁽¹⁾		862		-
Power		323		-
	$	2,211	$	608

Revenue by contract type:
Fixed price	$	1,726	$	583
Reimbursable		303		-
Hybrid		110		-
Unit-basis and other		72		25
	$	2,211	$	608

Revenue by recognition methodology:
Over time	$	2,160	$	608
At a point in time		51		-
	$	2,211	$	608

For the three months ended March 31, 2019, we recognized approximately $22 million of revenues resulting from changes in transaction prices associated with performance obligations satisfied in prior periods, primarily in our NCSA segment. For the three months ended March 31, 2018, we recognized approximately $66 million of revenues due to changes in transaction price associated with performance obligations satisfied in prior periods, primarily in our APAC segment. The changes in transaction prices primarily related to reimbursement of costs incurred in prior periods.

Revenues recognized during the three months ended March 31, 2019, with respect to amounts included in our Advance billings on contracts balance as of December 31, 2018, were approximately $768 million.

Unapproved Change Orders and Claims—As of March 31, 2019, we had unapproved change orders and claims included in transaction prices for our projects aggregating to approximately $297 million, of which approximately $93 million was included in our RPO balance. As of December 31, 2018, we had unapproved change orders and claims included in transaction prices for our projects aggregating to approximately $428 million, of which approximately $130 million was included in our RPO balance.

Incentives—As of March 31, 2019, we had incentives included in transaction prices for our projects aggregating to approximately $16 million, of which approximately $1 million was included in our RPO balance. As of December 31, 2018, we did not have any material incentives included in transaction prices for our projects.

The amounts recorded in contract prices and recognized as revenues reflect our best estimates of recovery; however, the ultimate resolution and amounts received could differ from these estimates and could have a material adverse effect on our results of operations, financial position and cash flow.

Our accrual of provisions for estimated losses on active uncompleted contracts as of March 31, 2019 was $190 million and primarily related to the Cameron LNG project and the Freeport LNG Trains 1 & 2 projects. Our accrual of provisions for estimated losses on active uncompleted contracts as of December 31, 2018 was $266 million and primarily related to the Cameron LNG, Freeport LNG Trains 1 & 2, Calpine and Abkatun-A2 projects. Our Freeport LNG Train 3 project is not anticipated to be in a loss position.

Summary information for our significant ongoing loss projects as of March 31, 2019 is as follows:

Cameron LNG―At March 31, 2019, our U.S. LNG export facility project in Hackberry, Louisiana for Cameron LNG (within our NCSA operating group) was approximately 65% complete on a post-Combination basis (approximately 90% on a pre-Combination basis) and had an accrued provision for estimated losses of approximately $128 million. For these purposes (and for purposes of the discussion below), when we refer to a percentage of completion on a pre-Combination basis, we are referring to the cumulative percentage of completion, which includes progress made prior to the Combination Date. In accordance with U.S. GAAP, as of the Combination Date, we reset the progress to completion for all of CB&I’s projects then in progress to 0% for accounting purposes based on the remaining costs to be incurred as of that date.

Freeport LNG―At March 31, 2019, Trains 1 & 2 of our U.S. LNG export facility project in Freeport, Texas for Freeport LNG (within our NCSA operating group) were approximately 80% complete on a post-Combination basis (approximately 95% on a pre-Combination basis) and had an accrued provision for estimated losses of approximately $19 million. During the three months ended March 31, 2019, the project was negatively impacted by $27 million due to changes in cost estimates resulting from increases in construction and subcontractor costs. These cost estimate increases were partially offset by the recording of approximately $11 million of incentive revenues. Additionally, Freeport LNG Train 3 was positively impacted by $16 million of changes in cost estimates at completion due to increased productivity and savings in indirect costs, resulting in an overall net immaterial impact on operating margin at completion for the Freeport LNG project taken as a whole.

Summary information for our significant loss projects previously reported in the 2018 Form 10-K that are substantially complete as of March 31, 2019 is as follows:

Calpine Power Project―At March 31, 2019, our U.S. gas turbine power project for Calpine (within our NCSA operating group) was approximately 95% complete on a post-Combination basis (approximately 99% on a pre-Combination basis), and the remaining accrued provision for estimated losses was not significant.

Abkatun-A2 Project―At March 31, 2019, our Abkatun-A2 platform project in Mexico for Pemex (within our NCSA operating group) was approximately 95% complete, and the remaining accrued provision for estimated losses was not significant.