Amortizable Intangible Assets - Additional Information (Details) $ in Millions	Sep. 30, 2020 USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]
Amortization expense estimated, year one (2020)	$ 107.5
Amortization expense estimated, year two (2021)	107.1
Amortization expense estimated, year three (2022)	102.6
Amortization expense estimated, year four (2023)	95.7
Amortization expense estimated, year five (2024)	$ 91.8