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Contingent Liabilities (Details) $ in Millions	9 Months Ended
	Sep. 27, 2025 USD ($)
Contingent Liabilities [Abstract]
Minimum limit of per claim for providing insurance coverage on annual basis	$ 5
Maximum limit of aggregate loss incurred annually for providing insurance coverage on annual basis	$ 10

X

- Definition

Represents maximum limit of aggregate loss incurred annually for providing insurance coverage on annual basis excluding for certain new claims from governments or municipalities.

+ References

No definition available.

+ Details

Name:	rgr_ThresholdLimitOfAggregateLossForInsuranceCoverageOnAnnualBasisExcludingNewClaimsFromGovernmentsOrMunicipalities
Namespace Prefix:	rgr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Represents minimum limit of per claim for providing insurance coverage on annual basis.

+ References

No definition available.

+ Details

Name:	rgr_ThresholdLimitOfLossesPerTransactionForTakingInsuranceCoverageOnAnnualBasis
Namespace Prefix:	rgr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- References

No definition available.

+ Details

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