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Revenue Recognition (Tables)

12 Months Ended

Dec. 31, 2021

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

Disaggregated Revenues

We allocate geographic revenues based on the location of the customers' operations. Revenues by geographic area and customer type were as follows:

						Year Ended December 31, 2021																								Year Ended December 31, 2020																								Year Ended December 31, 2019
						Nuclear Operations Group						Nuclear Power Group						Nuclear Services Group						Total						Nuclear Operations Group						Nuclear Power Group						Nuclear Services Group						Total						Nuclear Operations Group						Nuclear Power Group						Nuclear Services Group						Total
						(In thousands)
United States:
Government						$	1,527,704					$	—					$	114,465					$	1,642,169					$	1,540,256					$	—					$	113,075					$	1,653,331					$	1,368,555					$	—					$	111,236					$	1,479,791
Non-Government						87,809						44,102						5,560						137,471						98,986						35,432						19,061						153,479						51,802						38,058						17,907						107,767
						$	1,615,513					$	44,102					$	120,025					$	1,779,640					$	1,639,242					$	35,432					$	132,136					$	1,806,810					$	1,420,357					$	38,058					$	129,143					$	1,587,558
Canada:
Non-Government						$	—					$	345,412					$	3,417					$	348,829					$	—					$	309,433					$	4,357					$	313,790					$	—					$	287,948					$	2,196					$	290,144
Other:
Non-Government						$	7,085					$	17,568					$	96					$	24,749					$	7,015					$	26,404					$	—					$	33,419					$	8,230					$	26,634					$	—					$	34,864
Segment Revenues						$	1,622,598					$	407,082					$	123,538					2,153,218						$	1,646,257					$	371,269					$	136,493					2,154,019						$	1,428,587					$	352,640					$	131,339					1,912,566
Eliminations																								(29,144)																								(30,503)																								(17,646)
Revenues																								$	2,124,074																							$	2,123,516																							$	1,894,920

Revenues by timing of transfer of goods or services were as follows:

						Year Ended December 31, 2021																								Year Ended December 31, 2020																								Year Ended December 31, 2019
						Nuclear Operations Group						Nuclear Power Group						Nuclear Services Group						Total						Nuclear Operations Group						Nuclear Power Group						Nuclear Services Group						Total						Nuclear Operations Group						Nuclear Power Group						Nuclear Services Group						Total
						(In thousands)																								(In thousands)																								(In thousands)
Over time						$	1,622,462					$	355,477					$	123,538					$	2,101,477					$	1,646,092					$	322,745					$	136,493					$	2,105,330					$	1,428,348					$	305,075					$	131,339					$	1,864,762
Point-in-time						136						51,605						—						51,741						165						48,524						—						48,689						239						47,565						—						47,804
Segment Revenues						$	1,622,598					$	407,082					$	123,538					2,153,218						$	1,646,257					$	371,269					$	136,493					2,154,019						$	1,428,587					$	352,640					$	131,339					1,912,566
Eliminations																								(29,144)																								(30,503)																								(17,646)
Revenues																								$	2,124,074																							$	2,123,516																							$	1,894,920

Revenues by contract type were as follows:

						Year Ended December 31, 2021																								Year Ended December 31, 2020																								Year Ended December 31, 2019
						Nuclear Operations Group						Nuclear Power Group						Nuclear Services Group						Total						Nuclear Operations Group						Nuclear Power Group						Nuclear Services Group						Total						Nuclear Operations Group						Nuclear Power Group						Nuclear Services Group						Total
						(In thousands)																								(In thousands)																								(In thousands)
Fixed-Price Incentive Fee						$	1,244,916					$	9,279					$	—					$	1,254,195					$	1,226,770					$	1,578					$	—					$	1,228,348					$	1,137,883					$	2,511					$	—					$	1,140,394
Firm-Fixed-Price						271,656						307,200						38,151						617,007						306,296						296,394						32,334						635,024						210,631						282,014						26,163						518,808
Cost-Plus Fee						104,365						—						73,621						177,986						112,479						—						94,320						206,799						79,741						755						102,726						183,222
Time-and-Materials						1,661						90,603						11,766						104,030						712						73,297						9,839						83,848						332						67,360						2,450						70,142
Segment Revenues						$	1,622,598					$	407,082					$	123,538					2,153,218						$	1,646,257					$	371,269					$	136,493					2,154,019						$	1,428,587					$	352,640					$	131,339					1,912,566
Eliminations																								(29,144)																								(30,503)																								(17,646)
Revenues																								$	2,124,074																							$	2,123,516																							$	1,894,920

Contract with Customer, Asset and Liability

Retainages also vary as a result of timing differences between incurring costs and achieving milestones that allow us to recover these amounts.

						December 31,						December 31,
						2021						2020
						(In thousands)
Included in Contracts in progress:
Unbilled receivables						$	528,644					$	436,279
Retainages						$	51,507					$	55,172
Included in Other Assets:
Retainages						$	1,271					$	1,488
Advance billings on contracts						$	111,619					$	83,581

Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction

Of the remaining performance obligations on our contracts with customers at December 31, 2021, we expect to recognize revenues as follows:

						2022						2023						Thereafter						Total
						(In approximate millions)
Nuclear Operations Group						$	1,573					$	1,102					$	1,836					$	4,511
Nuclear Power Group						260						142						242						644
Nuclear Services Group						21						—						—						21
Total Remaining Performance Obligations						$	1,854					$	1,244					$	2,078					$	5,176

X

- Definition

Tabular disclosure of receivable, contract asset, and contract liability from contract with customer. Includes, but is not limited to, change in contract asset and contract liability.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130551-203045

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- Definition

Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130545-203045

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X

- Definition

Tabular disclosure of expected timing for satisfying remaining performance obligation.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 13
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130556-203045

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