XML 123 R114.htm IDEA: XBRL DOCUMENT
v3.21.2

Concentration of Credit Risk, Significant Customers and Geographic Information - Summary of Percentage of Customers Accounted for Revenue (Detail) - Rocket Lab USA, Inc. - Revenue Benchmark [Member] | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
US Government Customer D [Member] |  |
Concentration Risk [Line Items] |  |
Percentage of Revenue | 21.00% | 12.00%
International Customer E [Member] |  |
Concentration Risk [Line Items] |  |
Percentage of Revenue | 18.00% |
US Commercial Customer F [Member] |  |
Concentration Risk [Line Items] |  |
Percentage of Revenue | 15.00% |
US Commercial Customer G [Member] |  |
Concentration Risk [Line Items] |  |
Percentage of Revenue | 14.00% | 26.00%

X
- Definition Concentration risk percentage. + References No definition available. + Details
Name: | rklb_ConcentrationRiskPercentage
Namespace Prefix: | rklb_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_ConcentrationRiskLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | dei_LegalEntityAxis=rklb_RocketLabUsaIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_SalesRevenueNetMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=rklb_USGovernmentCustomerDMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=rklb_InternationalCustomerEMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=rklb_USCommercialCustomerFMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=rklb_USCommercialCustomerGMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |