v3.26.1
Segment Information - Financial Information Concerning Reportable Segments (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Dec. 31, 2025
Segment Reporting Information [Line Items]      
Total revenues $ 96.2 $ 103.2  
Cost of revenue 83.9 91.0  
Interest expense 2.3 3.8  
Equity in earnings (loss) of unconsolidated affiliates (5.8) (1.9)  
Net (loss) earnings from continuing operations (35.8) (38.7)  
Assets 1,239.6 2,096.4 $ 1,308.9
Goodwill 53.4 53.4 $ 53.4
Restaurant Group      
Segment Reporting Information [Line Items]      
Total revenues 91.9 99.1  
Operating Segments | Total Reportable Segments      
Segment Reporting Information [Line Items]      
Total revenues 91.9 99.1  
Cost of revenue 83.9 91.0  
Depreciation and amortization 2.0 2.4  
Other segment items 17.4 9.2  
Interest expense 1.8 1.5  
Equity in earnings (loss) of unconsolidated affiliates (6.1) (9.9)  
Net (loss) earnings from continuing operations (19.3) (14.9)  
Assets 582.3 812.3  
Goodwill 53.4 53.4  
Operating Segments | Restaurant Group      
Segment Reporting Information [Line Items]      
Total revenues 91.9 99.1  
Cost of revenue 83.9 91.0  
Depreciation and amortization 2.0 2.4  
Other segment items 17.4 9.2  
Interest expense 1.8 1.5  
Equity in earnings (loss) of unconsolidated affiliates 0.0 0.0  
Net (loss) earnings from continuing operations (13.2) (5.0)  
Assets 228.0 269.2  
Goodwill 53.4 53.4  
Operating Segments | Alight      
Segment Reporting Information [Line Items]      
Equity in earnings (loss) of unconsolidated affiliates (2.1) (1.9)  
Net (loss) earnings from continuing operations (2.1) (1.9)  
Assets 71.6 369.5  
Operating Segments | BKFC      
Segment Reporting Information [Line Items]      
Equity in earnings (loss) of unconsolidated affiliates (4.4) (10.4)  
Net (loss) earnings from continuing operations (4.4) (10.4)  
Assets 142.4 117.2  
Operating Segments | JANA      
Segment Reporting Information [Line Items]      
Equity in earnings (loss) of unconsolidated affiliates 0.4 2.4  
Net (loss) earnings from continuing operations 0.4 2.4  
Assets 140.3 56.4  
Operating Segments | Corporate and Other      
Segment Reporting Information [Line Items]      
Total revenues 4.3 4.1  
Net (loss) earnings from continuing operations (16.5) (23.8)  
Assets 657.3 1,284.1  
Goodwill 0.0 0.0  
Restaurant revenue      
Segment Reporting Information [Line Items]      
Total revenues 91.9 99.1  
Restaurant revenue | Restaurant Group      
Segment Reporting Information [Line Items]      
Total revenues 91.9 99.1  
Restaurant revenue | Operating Segments | Total Reportable Segments      
Segment Reporting Information [Line Items]      
Total revenues 91.9 99.1  
Restaurant revenue | Operating Segments | Restaurant Group      
Segment Reporting Information [Line Items]      
Total revenues 91.9 99.1  
Restaurant revenue | Operating Segments | Corporate and Other      
Segment Reporting Information [Line Items]      
Total revenues 0.0 0.0  
Other operating revenue      
Segment Reporting Information [Line Items]      
Total revenues 4.3 4.1  
Other operating revenue | Operating Segments | Total Reportable Segments      
Segment Reporting Information [Line Items]      
Total revenues 0.0 0.0  
Other operating revenue | Operating Segments | Restaurant Group      
Segment Reporting Information [Line Items]      
Total revenues 0.0 0.0  
Other operating revenue | Operating Segments | Corporate and Other      
Segment Reporting Information [Line Items]      
Total revenues $ 4.3 $ 4.1