XML 64 R48.htm IDEA: XBRL DOCUMENT
v3.24.0.1

Basis of Presentation and Significant Accounting Policies - Schedule of Intangible Assets (Detail) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | ---
Schedule Of Amortized And Unamortized Intangible Assets [Line Items] |  |  |
Amortized intangible assets: | $ 205,343 | $ 201,035 | $ 184,270
Accumulated amortization: | (63,663) | (51,253) | (42,549)
Net amortized intangible assets | 141,680 | 149,782 | 141,721
Technical support agreement |  |  |
Schedule Of Amortized And Unamortized Intangible Assets [Line Items] |  |  |
Amortized intangible assets: | 66,562 | 65,069 | 69,781
Accumulated amortization: | (15,676) | (12,495) | (10,366)
Customer relationships |  |  |
Schedule Of Amortized And Unamortized Intangible Assets [Line Items] |  |  |
Amortized intangible assets: | 57,103 | 56,176 | 40,247
Accumulated amortization: | (23,649) | (20,590) | (18,176)
Unpatented technology |  |  |
Schedule Of Amortized And Unamortized Intangible Assets [Line Items] |  |  |
Amortized intangible assets: | 40,540 | 39,609 | 38,073
Accumulated amortization: | (10,345) | (7,966) | (6,398)
CNSC class 1B nuclear facility license |  |  |
Schedule Of Amortized And Unamortized Intangible Assets [Line Items] |  |  |
Amortized intangible assets: | 25,670 | 25,094 | 26,911
Accumulated amortization: | (6,023) | (5,052) | (4,521)
Acquired backlog |  |  |
Schedule Of Amortized And Unamortized Intangible Assets [Line Items] |  |  |
Amortized intangible assets: | 13,882 | 13,537 | 7,595
Accumulated amortization: | (7,116) | (4,474) | (2,531)
Patented technology |  |  |
Schedule Of Amortized And Unamortized Intangible Assets [Line Items] |  |  |
Amortized intangible assets: | 755 | 738 | 792
Accumulated amortization: | (483) | (405) | (363)
All other |  |  |
Schedule Of Amortized And Unamortized Intangible Assets [Line Items] |  |  |
Amortized intangible assets: | 831 | 812 | 871
Accumulated amortization: | (371) | (271) | (194)
NRC category 1 license |  |  |
Schedule Of Amortized And Unamortized Intangible Assets [Line Items] |  |  |
Unamortized intangible assets: | $ 43,830 | $ 43,830 | $ 43,830

X
- Definition Schedule of amortized and unamortized intangible assets [Line Items] + References No definition available. + Details
Name: | bwxt_ScheduleOfAmortizedAndUnamortizedIntangibleAssetsLineItems
Namespace Prefix: | bwxt_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(16)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482665/350-30-50-2 + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 928 -SubTopic 340 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483147/928-340-50-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482665/350-30-50-2 + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 926 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Publisher FASB -URI https://asc.fasb.org//1943274/2147483154/926-20-50-5 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482665/350-30-50-2 + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482665/350-30-50-2 + Details
Name: | us-gaap_IndefiniteLivedIntangibleAssetsExcludingGoodwill
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=bwxt_TechnicalSupportAgreementandRelationshipMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_CustomerRelationshipsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_UnpatentedTechnologyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_LicensingAgreementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_OrderOrProductionBacklogMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_PatentedTechnologyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FiniteLivedIntangibleAssetsByMajorClassAxis=us-gaap_OtherIntangibleAssetsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IndefiniteLivedIntangibleAssetsByMajorClassAxis=bwxt_NrcCategoryOneLicenseMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |