Goodwill and Other Intangible Assets - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Goodwill [Line Items]
Goodwill	$ 1,028.4		$ 1,047.6
Amortization expense for intangible assets	14.1	$ 14.2
Future amortization expense 2021	55.7
Future amortization expense 2022	48.7
Future amortization expense 2023	45.6
Future amortization expense 2024	43.1
Future amortization expense 2025	$ 42.5