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Supplemental Financial Data - Future Amortization of Intangibles (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]      
2022 $ 595.5    
2023 561.6    
2024 506.1    
2025 442.5    
2026 372.3    
Thereafter 1,624.0    
Total 4,102.0    
Reacquired rights      
Finite-Lived Intangible Assets [Line Items]      
2022 22.3    
2023 22.3    
2024 22.3    
2025 22.3    
2026 22.3    
Thereafter 173.2    
Total 284.7    
Computer software      
Finite-Lived Intangible Assets [Line Items]      
2022 135.5    
2023 133.1    
2024 109.9    
2025 78.4    
2026 39.8    
Thereafter 60.8    
Total 557.5    
Customer relationship      
Finite-Lived Intangible Assets [Line Items]      
2022 243.8    
2023 225.8    
2024 207.6    
2025 189.5    
2026 171.5    
Thereafter 755.1    
Total 1,793.3 $ 1,912.9 $ 2,162.7
Database      
Finite-Lived Intangible Assets [Line Items]      
2022 177.0    
2023 163.6    
2024 150.0    
2025 136.0    
2026 122.5    
Thereafter 536.0    
Total 1,285.1 1,369.4 1,550.6
Other Intangibles      
Finite-Lived Intangible Assets [Line Items]      
2022 16.9    
2023 16.8    
2024 16.3    
2025 16.3    
2026 16.2    
Thereafter 98.9    
Total $ 181.4 $ 256.7 $ 265.4