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Goodwill and Identifiable Intangible Assets, net - Summary of Identifiable Intangible Assets, net (Details) - USD ($) $ in Millions | Mar. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Value | $ 206.1 | $ 200.1
Accumulated Amortization | (111.7) | (107.3)
Net | 94.4 | 92.8
Total identifiable intangible assets, net |  |
Gross Carrying Value | 215.0 | 209.0
Net | 103.3 | 101.7
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 | 72.7 | 72.4
Accumulated Amortization | (23.3) | (22.3)
Net | 49.4 | 50.1
Trademarks and tradenames with indefinite lives |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Value | 15.3 | 15.1
Accumulated Amortization | (2.0) | (1.6)
Net | 13.3 | 13.5
Capitalized software |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Value | 67.8 | 62.2
Accumulated Amortization | (52.3) | (49.8)
Net | 15.5 | 12.4
Technology |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Value | 37.1 | 37.2
Accumulated Amortization | (23.9) | (23.5)
Net | 13.2 | 13.7
Contracts |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross Carrying Value | 13.2 | 13.2
Accumulated Amortization | (10.2) | (10.1)
Net | $ 3.0 | $ 3.1

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