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INCOME TAXES (Additional Information) (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2023 USD ($)
Income Tax Disclosure [Abstract]
Uncertain Tax Positions	$ 2,769

X

- Definition

Uncertain tax positions

+ References

No definition available.

+ Details

Name:	rklb_UncertainTaxPositions
Namespace Prefix:	rklb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- References

No definition available.

+ Details

Name:	us-gaap_IncomeTaxDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration