Goodwill and Identifiable Intangible Assets, net - Summary of Identifiable Intangible Assets, net (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 322.7	$ 321.5
Accumulated Amortization	(167.4)	(159.4)
Net	155.3	162.1
Total identifiable intangible assets, net
Gross Carrying Value	331.6	330.4
Net	164.2	171.0
Trademarks and tradenames with indefinite lives
Indefinite-lived Intangible Assets [Line Items]
Trademarks and tradenames with indefinite lives	8.9	8.9
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	103.4	105.2
Accumulated Amortization	(38.2)	(37.2)
Net	65.2	68.0
Trademarks and tradenames with indefinite lives
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	31.1	31.3
Accumulated Amortization	(9.2)	(8.5)
Net	21.9	22.8
Software
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	109.6	104.7
Accumulated Amortization	(75.2)	(69.7)
Net	34.4	35.0
Technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	65.1	66.7
Accumulated Amortization	(33.7)	(33.0)
Net	31.4	33.7
Contracts
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	13.5	13.6
Accumulated Amortization	(11.1)	(11.0)
Net	$ 2.4	$ 2.6