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Related Party Transactions - Additional Information (Detail) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 6 Months Ended
Apr. 30, 2018
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Dec. 31, 2017
Cannae and THLM [Member]            
Management fees description       Amount equal to the greater of (a) $0.9, or (b) 0.5 percent of Adjusted EBITDA.    
Management fee under condition one       $ 0.9    
Management fee percentage of EBITDA under condition two       0.50%    
Number of years for which present value of the management fee to be paid in case of agreement termination 7 years          
Management agreeement termination fee $ 11.3          
Management fee   $ 11.5 $ 0.5 $ 12.0 $ 0.9  
CompuCom Systems, Inc. [Member]            
Payment to service provider   0.5 0.9 0.7 1.4  
The Stronach Group [Member] | Dayforce [Member]            
Revenue from related parties   0.1   0.2    
FNF [Member]            
Senior notes owned           $ 24.0
Interest payments received   0.5 0.8 1.3 1.6  
FNF [Member] | Dayforce [Member]            
Revenue from related parties   $ 0.1 $ 0.1 $ 0.2 $ 0.4