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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2018
Summary of Significant Accounting Policies  
Schedule of client commission arrangement

Client commissions allocated for research and related research receivable and accrued research payable balances for the years ended December 31, 2018, 2017 and 2016 were as follows (dollars in millions):

 

 

 

 

 

 

 

 

 

 

 

 

    

2018

    

2017

    

2016

 

Client commissions allocated for research

 

$

79.3

 

$

96.3

 

$

100.7

 

 

 

 

 

 

 

 

 

 

 

 

Research receivable, gross

 

$

5.4

 

$

5.3

 

$

3.0

 

Allowance for research receivable

 

 

(0.1)

 

 

(0.1)

 

 

(0.1)

 

Research receivable, net of allowance

 

$

5.3

 

$

5.2

 

$

2.9

 

 

 

 

 

 

 

 

 

 

 

 

Accrued research payable

 

$

74.2

 

$

51.3

 

$

45.8