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Goodwill and Intangible Assets - Summary of Intangible Assets (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]    
Accumulated Amortization $ (659.2) $ (566.7)
Net Carrying Amount 492.8  
Gross Carrying Amount 1,914.3 1,664.4
Accumulated Amortization (659.2) (566.7)
Net Carrying Amount 1,255.1 1,097.7
Trade names and branding    
Indefinite-lived Intangible Assets [Line Items]    
Gross Carrying Amount 445.0 445.0
Net Carrying Amount 445.0 445.0
Domain portfolio    
Indefinite-lived Intangible Assets [Line Items]    
Gross Carrying Amount 250.3 148.1
Net Carrying Amount 250.3 148.1
Contractual-based assets    
Indefinite-lived Intangible Assets [Line Items]    
Gross Carrying Amount 67.0  
Net Carrying Amount 67.0  
Customer-related    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 857.0 838.4
Accumulated Amortization (534.7) (475.6)
Net Carrying Amount 322.3 362.8
Accumulated Amortization (534.7) (475.6)
Developed technology    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 188.1 151.5
Accumulated Amortization (90.7) (67.3)
Net Carrying Amount 97.4 84.2
Accumulated Amortization (90.7) (67.3)
Trade names and other    
Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 106.9 81.4
Accumulated Amortization (33.8) (23.8)
Net Carrying Amount 73.1 57.6
Accumulated Amortization $ (33.8) $ (23.8)