XML 95 R65.htm IDEA: XBRL DOCUMENT v3.22.0.1
PROPERTY AND EQUIPMENT, NET - Headquarters location (Details) - USD ($)
$ in Millions
3 Months Ended
Jun. 30, 2020
Dec. 31, 2021
Dec. 31, 2020
Property and Equipment, Net      
Property held and used   $ 105.2 $ 82.6
Land   2.3  
Property and equipment   105.2 $ 82.6
Chicago Headquarters Location      
Property and Equipment, Net      
Property held and used   11.7  
Land   2.3  
Property and equipment   $ 9.4  
Chicago Headquarters Location | Options      
Property and Equipment, Net      
Impairment charge $ 8.1