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Goodwill (Details) (USD $)
12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Goodwill [Line Items]      
Goodwill $ 697,470,000us-gaap_Goodwill $ 697,470,000us-gaap_Goodwill $ 697,470,000us-gaap_Goodwill
Applebee's      
Goodwill [Line Items]      
Goodwill 686,700,000us-gaap_Goodwill
/ dei_LegalEntityAxis
= din_ApplebeesMember
686,700,000us-gaap_Goodwill
/ dei_LegalEntityAxis
= din_ApplebeesMember
 
Goodwill, Impairment Loss 0us-gaap_GoodwillImpairmentLoss
/ dei_LegalEntityAxis
= din_ApplebeesMember
0us-gaap_GoodwillImpairmentLoss
/ dei_LegalEntityAxis
= din_ApplebeesMember
 
IHOP      
Goodwill [Line Items]      
Goodwill 10,800,000us-gaap_Goodwill
/ dei_LegalEntityAxis
= din_IhopMember
10,800,000us-gaap_Goodwill
/ dei_LegalEntityAxis
= din_IhopMember
 
Goodwill, Impairment Loss $ 0us-gaap_GoodwillImpairmentLoss
/ dei_LegalEntityAxis
= din_IhopMember
$ 0us-gaap_GoodwillImpairmentLoss
/ dei_LegalEntityAxis
= din_IhopMember