Revenue Recognition - Disaggregated Revenue (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Total operating revenues	$ 173.0	$ 262.3
Restaurant sales
Disaggregation of Revenue [Line Items]
Total operating revenues	169.9	257.8
Restaurant Group
Disaggregation of Revenue [Line Items]
Total operating revenues	169.9	257.8
Restaurant Group | Restaurant sales
Disaggregation of Revenue [Line Items]
Total operating revenues	167.0	245.3
Restaurant Group | Bakery sales
Disaggregation of Revenue [Line Items]
Total operating revenues	2.2	11.0
Restaurant Group | Franchise and other
Disaggregation of Revenue [Line Items]
Total operating revenues	0.7	1.5
Corporate and Other | Real estate and resort
Disaggregation of Revenue [Line Items]
Total operating revenues	2.8	4.4
Corporate and Other | Other
Disaggregation of Revenue [Line Items]
Total operating revenues	0.3	0.1
Total other operating revenue
Disaggregation of Revenue [Line Items]
Total operating revenues	$ 3.1	$ 4.5