XML 73 R60.htm IDEA: XBRL DOCUMENT v3.20.2
Transformation Initiatives - Additional Information (Detail) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2020
Restructuring Cost And Reserve [Line Items]    
Costs associated with transformation initiatives $ 55,374 $ 55,374
Cost of Revenue [Member]    
Restructuring Cost And Reserve [Line Items]    
Costs associated with transformation initiatives 15,700 15,700
Operating, Administrative, and Other [Member]    
Restructuring Cost And Reserve [Line Items]    
Costs associated with transformation initiatives 39,700 39,700
Advisory Services [Member]    
Restructuring Cost And Reserve [Line Items]    
Costs associated with transformation initiatives 38,300 38,300
Global Workplace Solutions [Member]    
Restructuring Cost And Reserve [Line Items]    
Costs associated with transformation initiatives $ 17,100 $ 17,100