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Debt (Tables)
 9 Months Ended
Sep. 30, 2020
Debt Disclosure [Abstract]  
Schedule of debt balances
As of September 30, 2020 and December 31, 2019, our debt balances were as follows (in millions):
Weighted-Average Interest RateMaturitiesSeptember 30, 2020December 31, 2019
Senior Unsecured Notes6.25 %2022$249.8 $249.8 
Unamortized Debt Discounts and Issuance Costs(1.3)(1.7)
Total Debt, net$248.5 $248.1