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Long-Term Debt - Schedule of Long-Term Debt (Details) - USD ($)
$ in Millions
Jun. 30, 2021
Dec. 31, 2020
Long-term Debt    
Long-term debt $ 0.0 $ 226.7
Long-term debt discount 0.0 (1.9)
Long-term debt, net 0.0 224.8
Current portion of long-term debt 106.4 0.0
Current portion of long-term debt discount (2.3) 0.0
Debt, net $ 104.1 $ 224.8