v3.25.1
Goodwill and Intangible Assets - Schedule of Finite-Lived and Indefinite-Lived Intangible Assets (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Finite-lived Intangible Assets [Roll Forward]    
Amortization $ (90.8) $ (99.0)
Other indefinite-lived intangibles    
Balance at beginning of period 1,280.0 1,280.0
Additions at cost 0.0 0.0
Other 0.0 0.0
Balance at end of period 1,280.0 1,280.0
Total    
Balance at beginning of period 3,506.8 3,915.9
Additions at cost 0.2 0.1
Amortization (90.8) (99.0)
Other 18.8 (11.8)
Balance at end of period 3,435.0 3,805.2
Customer relationships    
Finite-lived Intangible Assets [Roll Forward]    
Balance at beginning of period 1,108.7 1,316.7
Additions at cost 0.0 0.0
Amortization (47.9) (52.4)
Other 3.6 (2.6)
Balance at end of period 1,064.4 1,261.7
Total    
Amortization (47.9) (52.4)
Reacquired rights    
Finite-lived Intangible Assets [Roll Forward]    
Balance at beginning of period 200.3 233.9
Additions at cost 0.0 0.0
Amortization (4.6) (4.8)
Other 10.6 (6.3)
Balance at end of period 206.3 222.8
Total    
Amortization (4.6) (4.8)
Database    
Finite-lived Intangible Assets [Roll Forward]    
Balance at beginning of period 790.0 940.6
Additions at cost 0.0 0.0
Amortization (34.2) (37.7)
Other 3.0 (2.4)
Balance at end of period 758.8 900.5
Total    
Amortization (34.2) (37.7)
Other intangibles    
Finite-lived Intangible Assets [Roll Forward]    
Balance at beginning of period 127.8 144.7
Additions at cost 0.2 0.1
Amortization (4.1) (4.1)
Other 1.6 (0.5)
Balance at end of period 125.5 140.2
Total    
Amortization $ (4.1) $ (4.1)