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Goodwill and Identifiable Intangible Assets, net - Summary of Identifiable Intangible Assets, net (Details) - USD ($) $ in Millions | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Value | $ 330.6 | $ 321.5
Accumulated Amortization | (177.4) | (159.4)
Net | 153.2 | 162.1
Total identifiable intangible assets, net |  |
Gross Carrying Value | 339.5 | 330.4
Net | 162.1 | 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 | 104.5 | 105.2
Accumulated Amortization | (40.0) | (37.2)
Net | 64.5 | 68.0
Trademarks and tradenames with indefinite lives |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Value | 31.3 | 31.3
Accumulated Amortization | (10.0) | (8.5)
Net | 21.3 | 22.8
Software |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Value | 115.8 | 104.7
Accumulated Amortization | (80.7) | (69.7)
Net | 35.1 | 35.0
Technology |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Value | 65.4 | 66.7
Accumulated Amortization | (35.5) | (33.0)
Net | 29.9 | 33.7
Contracts |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Value | 13.6 | 13.6
Accumulated Amortization | (11.2) | (11.0)
Net | $ 2.4 | $ 2.6

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