Document and Entity Information (USD $)
In Millions, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Feb. 24, 2012
Jul. 03, 2011
Document And Entity Information [Abstract]      
Entity Registrant Name DineEquity, Inc    
Entity Central Index Key 0000049754    
Current Fiscal Year End Date --12-31    
Entity Filer Category Large Accelerated Filer    
Document Type 10-K    
Document Period End Date Dec. 31, 2011    
Document Fiscal Year Focus 2011    
Document Fiscal Period Focus FY    
Amendment Flag false    
Entity Current Reporting Status Yes    
Entity Common Stock, Shares Outstanding   18,095,838  
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Public Float     $ 833.4