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Debt (Tables)
9 Months Ended
Sep. 30, 2021
Debt Disclosure [Abstract]  
Schedule of debt balances As of September 30, 2021 and December 31, 2020, our debt balances were as follows (in millions):
Weighted-Average Interest RateMaturitySeptember 30, 2021December 31, 2020
Revolving credit facility1.61 %2023$145.0 $180.0