Goodwill and Other Intangible Assets - Goodwill (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Goodwill [Roll Forward]
Balance, December 31, 2019			$ 66.1
Goodwill impairment	$ 0.0	$ 0.0	(7.7)	$ 0.0
Deconsolidation of Blue Ribbon			(4.9)
Balance, September 30, 2020	53.5	$ 76.5	53.5	$ 76.5
Restaurant Group
Goodwill [Roll Forward]
Balance, December 31, 2019			66.1
Goodwill impairment			(7.7)
Deconsolidation of Blue Ribbon			(4.9)
Balance, September 30, 2020	53.5		53.5
Corporate and Other
Goodwill [Roll Forward]
Balance, December 31, 2019			0.0
Goodwill impairment			0.0
Deconsolidation of Blue Ribbon			0.0
Balance, September 30, 2020	$ 0.0		$ 0.0