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Goodwill and Other Intangible Assets - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]      
Amortization of other intangible assets $ 462.7 $ 364.7 $ 316.5
Amortization expense, 2021 580.0    
Amortization expense, 2022 564.0    
Amortization expense, 2023 555.0    
Amortization expense, 2024 514.0    
Amortization expense, 2025 $ 485.0