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Goodwill - (Tables)
 12 Months Ended
Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]  
Schedule of Goodwill
The significant majority of the Company's goodwill arose from the November 29, 2007 acquisition of Applebee's. Changes in the carrying amount of goodwill for the years ended December 31, 2017, 2016 and 2015 are as follows:
 
Applebee's Franchise Unit
 
IHOP Franchise Unit
 
Total
 
(In millions)
Balance at December 31, 2015:
 

 
 

 
 
Goodwill, gross
$
686.7

 
$
10.8

 
$
697.5

Accumulated impairment loss
—

 
—

 
—

Goodwill
686.7

 
10.8

 
697.5

2016 impairment loss
—

 
—

 
—

Balance at December 31, 2016:
 

 
 

 
 
Goodwill, gross
$
686.7

 
$
10.8

 
$
697.5

Accumulated impairment loss
—

 
—

 
—

Goodwill
686.7

 
10.8

 
697.5

2017 impairment loss
(358.2
)
 
—

 
(358.2
)
Balance at December 31, 2017:
 
 
 
 
 
Goodwill, gross
686.7

 
10.8

 
697.5

Accumulated impairment loss
(358.2
)
 
—

 
(358.2
)
Goodwill
$
328.5

 
$
10.8

 
$
339.2