Goodwill and Identifiable Intangible Assets, net - Summary of Identifiable Intangible Assets, net (Details) - USD ($) $ in Millions	Sep. 30, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 322.7	$ 308.4
Accumulated Amortization	(164.0)	(135.2)
Net	158.7	173.2
Total identifiable intangible assets, net
Gross Carrying Value	331.6	317.3
Net	167.6	182.1
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	102.0	102.0
Accumulated Amortization	(34.9)	(30.5)
Net	67.1	71.5
Trademarks and tradenames with indefinite lives
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	30.9	31.1
Accumulated Amortization	(7.5)	(4.3)
Net	23.4	26.8
Software
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	109.3	95.3
Accumulated Amortization	(78.7)	(62.8)
Net	30.6	32.5
Technology
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	67.0	66.8
Accumulated Amortization	(32.1)	(27.2)
Net	34.9	39.6
Contracts
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	13.5	13.2
Accumulated Amortization	(10.8)	(10.4)
Net	$ 2.7	$ 2.8