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Commitments and Contingencies Commitments and Contingencies (Tables)
 9 Months Ended
Sep. 30, 2019
Commitments and Contingencies [Abstract]  
Summary of Maturities of Lease Liabilities The following is a summary of our maturities of our lease liabilities as of September 30, 2019:
(in millions)
 
Year ended December 31,
Operating Leases

Remainder of 2019
$
1.4

2020
3.4

2021
3.2

2022
2.9

2023
2.7

Thereafter
4.9

Less: discount for time value
(2.8
)
Lease liability as of September 30, 2019
$
15.7