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Earnings (Loss) Per Share Share Repurchase Information (Details) (USD $)
In Millions, except Share data, unless otherwise specified
 6 Months Ended
Dec. 28, 2014
Dec. 29, 2013
Stock Repurchase Program, Remaining Authorized Repurchase Amount $ 59.7us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1  
Treasury Stock, Shares, Acquired 1,428,588us-gaap_TreasuryStockSharesAcquired 1,066,447us-gaap_TreasuryStockSharesAcquired
Treasury Stock Acquired, Average Cost Per Share $ 19.33us-gaap_TreasuryStockAcquiredAverageCostPerShare $ 19.77us-gaap_TreasuryStockAcquiredAverageCostPerShare
Fiscal 2014 Share Repurchase Program [Member] [Domain]    
Stock Repurchase Program, Authorized Amount 50us-gaap_StockRepurchaseProgramAuthorizedAmount1
/ us-gaap_StatementScenarioAxis
= bgg_Fiscal2014ShareRepurchaseProgramMemberDomain		  
Fiscal 2015 Share Repurchase Program [Member]    
Stock Repurchase Program, Authorized Amount $ 50us-gaap_StockRepurchaseProgramAuthorizedAmount1
/ us-gaap_StatementScenarioAxis
= bgg_Fiscal2015ShareRepurchaseProgramMember