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Equity-Based Compensation - Consolidated Businesses (Detail) - Stock Options - USD ($)
$ in Millions
3 Months Ended
Nov. 03, 2014
Mar. 31, 2017
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Stock awards vesting period   4 years
FolioDynamix    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Stock options granted in the period, fair value $ 5.1  
First anniversary of grant date    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Vesting percentage   25.00%
Vested ratably each month over the subsequent 36 months    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Stock awards vesting period   36 months
Vesting percentage   75.00%
Vested on each Anniversary    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Vesting percentage   25.00%
Vested in November 2015 | FolioDynamix    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Vesting percentage 25.00%  
Vested ratably each month through November 2018 | FolioDynamix    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Vesting percentage 75.00%