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Commitments and Contingencies - Narrative (Details) (Applebee's, Property Lease Guarantee, USD $)
In Millions, unless otherwise specified
Mar. 31, 2015
Applebee's | Property Lease Guarantee
 
Loss Contingencies [Line Items]  
Potential liability for guaranteed leases $ 373.1us-gaap_GuaranteeObligationsMaximumExposure
/ dei_LegalEntityAxis
= din_ApplebeesMember
/ us-gaap_LossContingenciesByNatureOfContingencyAxis
= us-gaap_PropertyLeaseGuaranteeMember