Annual report pursuant to Section 13 and 15(d)

Description of Business and Summary of Significant Accounting Policies (Details 2)

v2.4.1.9
Description of Business and Summary of Significant Accounting Policies (Details 2) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 4 Months Ended 12 Months Ended
Dec. 28, 2014
Oct. 05, 2014
Jul. 13, 2014
Dec. 29, 2013
Oct. 06, 2013
Jul. 14, 2013
Apr. 20, 2014
Apr. 21, 2013
Dec. 28, 2014
Dec. 29, 2013
Dec. 30, 2012
Description of business and summary of significant accounting policies                      
Duration of fiscal period 84 days 84 days 84 days 84 days 84 days 84 days 112 days 112 days 364 days 364 days 371 days
Length of next fiscal year                 364 days    
Accounts Receivable                      
Gift cards in transit in accounts receivable                 $ 12.7rrgb_AccountsReceivableGiftCardInTransit $ 10.7rrgb_AccountsReceivableGiftCardInTransit  
Tenant improvement allowances 3.2rrgb_AllowanceForTenantImprovements     5.2rrgb_AllowanceForTenantImprovements         3.2rrgb_AllowanceForTenantImprovements 5.2rrgb_AllowanceForTenantImprovements  
Inventories                      
Food and beverage inventories 8.5us-gaap_InventoryFinishedGoodsNetOfReserves     6.8us-gaap_InventoryFinishedGoodsNetOfReserves         8.5us-gaap_InventoryFinishedGoodsNetOfReserves 6.8us-gaap_InventoryFinishedGoodsNetOfReserves  
Supplies inventories $ 17.4us-gaap_InventorySuppliesNetOfReserves     $ 15.2us-gaap_InventorySuppliesNetOfReserves         $ 17.4us-gaap_InventorySuppliesNetOfReserves $ 15.2us-gaap_InventorySuppliesNetOfReserves  
Minimum                      
Description of business and summary of significant accounting policies                      
Duration of fiscal period                 364 days    
Cash Equivalents                      
Period for conversion of amounts receivable from credit card issuers into cash                 2 days    
Accounts Receivable                      
Period for cash settlement of gift cards sold                   15 days  
Maximum                      
Description of business and summary of significant accounting policies                      
Duration of fiscal period                 371 days    
Cash Equivalents                      
Period for conversion of amounts receivable from credit card issuers into cash                 4 days    
Accounts Receivable                      
Period for cash settlement of gift cards sold                   45 days