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Goodwill and Intangible Assets - Narrative (Details) - USD ($)
$ in Millions
1 Months Ended 12 Months Ended
Dec. 31, 2020
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]        
Purchases of intangible assets   $ 15.0 $ 4.7 $ 9.3
Expected payments for intangible assets $ 2.0 2.0    
Amortization expense   $ 127.1 $ 119.5 $ 136.7
Weighted Average        
Finite-Lived Intangible Assets [Line Items]        
Weighted average remaining amortization period   60 months    
Customer-related | Weighted Average        
Finite-Lived Intangible Assets [Line Items]        
Weighted average remaining amortization period   62 months    
Developed technology | Weighted Average        
Finite-Lived Intangible Assets [Line Items]        
Weighted average remaining amortization period   39 months    
Trade names and other | Weighted Average        
Finite-Lived Intangible Assets [Line Items]        
Weighted average remaining amortization period   79 months    
Domain Portfolio Intangible Rights        
Finite-Lived Intangible Assets [Line Items]        
Purchases of intangible assets $ 17.0