Subsequent Events (Details) (Subsequent Event)	Apr. 20, 2015 Restaurant
Subsequent Event
Subsequent Event [Line Items]
Sales agreement, number of restaurants refranchised and sold	23

Sale and Franchising Agreement, Franchisor Owned Restaurants, Number

No definition available.

Name:	din_SaleandFranchisingAgreementFranchisorOwnedRestaurantsNumber
Namespace Prefix:	din_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant