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Unrecognized Tax Benefits (Details) (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Dec. 28, 2014
Income Tax Contingency [Line Items]  
Unrecognized Tax Benefits, Period Increase (Decrease) $ (2,000)us-gaap_UnrecognizedTaxBenefitsPeriodIncreaseDecrease
Unrecognized Tax Benefits, Period Increase (Decrease), Current Effective Tax Rate Impact [Member]  
Income Tax Contingency [Line Items]  
Unrecognized Tax Benefits, Period Increase (Decrease) $ (2,000)us-gaap_UnrecognizedTaxBenefitsPeriodIncreaseDecrease
/ us-gaap_IncomeTaxAuthorityAxis
= bgg_UnrecognizedTaxBenefitsPeriodIncreaseCurrentEffectiveTaxRateImpactMember