Goodwill and Identifiable Intangible Assets, net - Remaining Weighted Average Useful Life of Definite Lived Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Finite Lived Intangible Assets [Line Items]
Remaining weighted average useful lives	8 years
Intangible assets, net	$ 162.1	$ 173.2
Protective
Finite Lived Intangible Assets [Line Items]
Intangible assets, net	$ 120.5
Customer relationships
Finite Lived Intangible Assets [Line Items]
Remaining weighted average useful lives	11 years 8 months 12 days
Intangible assets, net	$ 68.0	71.5
Customer relationships | Protective
Finite Lived Intangible Assets [Line Items]
Remaining weighted average useful lives	12 years
Intangible assets, net	$ 47.6
Trademarks and trade names
Finite Lived Intangible Assets [Line Items]
Remaining weighted average useful lives	9 years 1 month 6 days
Intangible assets, net	$ 22.8	26.8
Technology
Finite Lived Intangible Assets [Line Items]
Remaining weighted average useful lives	4 years 1 month 6 days
Intangible assets, net	$ 33.7	39.6
Contracts
Finite Lived Intangible Assets [Line Items]
Remaining weighted average useful lives	6 years 4 months 24 days
Intangible assets, net	$ 2.6	$ 2.8