XML 130 R55.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Basis of Presentation and Significant Accounting Policies (Details)
$ in Millions
12 Months Ended
Dec. 31, 2019
USD ($)
affiliate
segment
item
Jan. 01, 2019
USD ($)
Property and equipment    
Number of reportable segments (in segments) | segment 3  
Minimum vesting period of long term profit-interest plan 3 years  
Maximum vesting period of long term profit-interest plan 5 years  
Period of earnings on which multiple for redemption of long term profit-interest compensation awards is based 12 months  
Number of reporting units | item 6  
Number of consolidated affiliates represented as reporting units | affiliate 6,000  
Operating lease right-of-use asset $ 37.7 $ 44.2
Total $ 42.5 49.9
Office equipment | Minimum    
Property and equipment    
Property and equipment useful life 3 years  
Office equipment | Maximum    
Property and equipment    
Property and equipment useful life 5 years  
Furniture and Fixtures | Maximum    
Property and equipment    
Property and equipment useful life 7 years  
Building | Maximum    
Property and equipment    
Property and equipment useful life 39 years  
Client relationships | Minimum    
Property and equipment    
Useful life 5 years  
Client relationships | Maximum    
Property and equipment    
Useful life 16 years  
Accounting Standards Update 2016-02 | Minimum    
Property and equipment    
Operating lease right-of-use asset   46.0
Accounting Standards Update 2016-02 | Maximum    
Property and equipment    
Operating lease right-of-use asset   $ 51.0