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CONSOLIDATED CONDENSED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parenthetical) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Unrealized gain (loss) on interest rate swaps, tax:        
Unrealized loss arising during the period, tax (provision) benefit $ 0.2 $ 1.5 $ (1.1) $ 1.5
Reclassification adjustment for loss included in floor plan interest expense, tax benefit $ 0.1 $ (0.0) $ 0.2 $ (0.0)