Revenue Recognition - Disaggregated Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Disaggregation of Revenue [Line Items]
Total operating revenues	$ 102.6	$ 272.2	$ 275.6	$ 534.5
Restaurant sales
Disaggregation of Revenue [Line Items]
Total operating revenues	99.4	266.5	269.3	524.3
Restaurant Group
Disaggregation of Revenue [Line Items]
Total operating revenues	99.4	266.5	269.3	524.3
Restaurant Group | Restaurant sales
Disaggregation of Revenue [Line Items]
Total operating revenues	99.3	247.7	266.3	493.0
Restaurant Group | Bakery sales
Disaggregation of Revenue [Line Items]
Total operating revenues	0.0	17.4	2.2	28.4
Restaurant Group | Franchise and other
Disaggregation of Revenue [Line Items]
Total operating revenues	0.1	1.4	0.8	2.9
Corporate and Other | Real estate and resort
Disaggregation of Revenue [Line Items]
Total operating revenues	3.0	5.7	5.8	10.1
Corporate and Other | Other
Disaggregation of Revenue [Line Items]
Total operating revenues	0.2	0.0	0.5	0.1
Total other operating revenue
Disaggregation of Revenue [Line Items]
Total operating revenues	$ 3.2	$ 5.7	$ 6.3	$ 10.2