v3.24.1.u1
Goodwill and Acquired Intangible Assets - Intangible Assets (Details) - USD ($)
$ in Millions
Mar. 31, 2024
Dec. 31, 2023
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 629.9 $ 629.9
Accumulated Amortization (343.1) (328.3)
Net 286.8 301.6
Acquired Indefinite-lived Intangible Assets [Line Items]    
Intangible assets not subject to amortization 33.0 33.0
Total intangible assets 662.9 662.9
Total intangible assets 319.8 334.6
Pre-Acquisition ZI brand portfolio    
Acquired Indefinite-lived Intangible Assets [Line Items]    
Intangible assets not subject to amortization 33.0 33.0
Customer relationships    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount 287.6 287.6
Accumulated Amortization (117.5) (112.5)
Net $ 170.1 $ 175.1
Weighted Average Amortization Period in Years 14 years 6 months 14 years 6 months
Acquired technology    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 330.8 $ 330.8
Accumulated Amortization (217.9) (208.4)
Net $ 112.9 $ 122.4
Weighted Average Amortization Period in Years 6 years 3 months 18 days 6 years 3 months 18 days
Brand portfolio    
Acquired Finite-Lived Intangible Assets [Line Items]    
Gross Carrying Amount $ 11.5 $ 11.5
Accumulated Amortization (7.7) (7.4)
Net $ 3.8 $ 4.1
Weighted Average Amortization Period in Years 7 years 9 months 18 days 7 years 10 months 24 days