Annual report pursuant to Section 13 and 15(d)

Intangible Assets - Schedule of Expected Future Annual Amortization Expense (Details)

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Intangible Assets - Schedule of Expected Future Annual Amortization Expense (Details)
$ in Millions
Dec. 31, 2018
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
2019 $ 7.1
2020 7.0
2021 7.0
2022 3.7
2023 $ 0.4