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Business and Summary of Significant Accounting Policies - Redeemable Non-controlling Interest (Details) - USD ($)
$ in Millions
1 Months Ended
Jul. 29, 2020
Jan. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Noncontrolling Interest [Line Items]        
Initial value     $ 344  
Thomas H. Lee Partners, LP and Affiliates [Member]        
Noncontrolling Interest [Line Items]        
Period with no public offering   4 years    
Thomas H. Lee Partners, LP and Affiliates [Member] | Black Knight Financial Services, Inc. | ServiceLink Holdings, LLC        
Noncontrolling Interest [Line Items]        
Redeemable non-controlling interest, ownership percentage   35.00% 21.00% 35.00%
ServiceLink Holdings, LLC        
Noncontrolling Interest [Line Items]        
Purchase of outstanding Class A units of minority owners $ 90