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Goodwill and Identifiable Intangible Assets - Amortization Expense and Estimated Future Amortization (Details)
$ in Millions
 3 Months Ended 12 Months Ended
Jun. 30, 2021
reportingUnit
Dec. 31, 2021
USD ($)
Dec. 31, 2021
USD ($)
segment
Dec. 31, 2021
USD ($)
reportingUnit
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]            
Amortization of intangibles   $ 46.3     $ 32.8 $ 35.4
Estimate Amortization Expense            
Estimated amortization expense, 2022 [1]   42.8 $ 42.8 $ 42.8    
Estimated amortization expense, 2023 [1]   40.5 40.5 40.5    
Estimated amortization expense, 2024 [1]   38.8 38.8 38.8    
Estimated amortization expense, 2025 [1]   37.2 37.2 37.2    
Estimated amortization expense, 2026 [1]   $ 35.1 $ 35.1 $ 35.1    
Number of reporting units 3   3 3    
[1] Actual amounts of amortization expense may differ from estimated amounts due to changes in foreign currency exchange rates, additional intangible asset acquisitions, impairment of intangible assets, accelerated amortization of intangible assets and other events.