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Business Combinations - Narrative (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 9 Months Ended
Nov. 08, 2019
Jan. 31, 2019
Dec. 31, 2019
Sep. 30, 2019
ChameleonX | Forecast        
Business Acquisition [Line Items]        
Cash consideration     $ 15.0  
Exceda | Subsequent Event        
Business Acquisition [Line Items]        
Cash consideration $ 33.0      
Janrain, Inc.        
Business Acquisition [Line Items]        
Cash consideration   $ 123.6    
Goodwill expected to be tax deductible   $ 42.5    
Weighted average useful life   5 years    
General and administrative        
Business Acquisition [Line Items]        
Acquisition-related costs       $ 1.2