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Accumulated Other Comprehensive Income (Loss) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Increase (Decrease) in AOCI [Roll Forward] |  |  |  |
BALANCE | $ 1,215.9 | $ 1,164.1 | $ 1,255.7 | $ 1,095.7
Other comprehensive income (loss) before reclassifications: |  |  |  |
Pre-tax |  |  | (75.6) | (37.1)
Tax effect |  |  | 10.9 | 6.0
Amounts reclassified from accumulated other comprehensive income (loss): |  |  |  |
Provision (benefit) for income taxes |  |  | (1.7) | 0.2
Net current period other comprehensive income (loss) | 7.0 | (17.0) | (59.3) | (31.7)
BALANCE | 1,356.9 | 1,186.3 | 1,356.9 | 1,186.3
Floorplan interest expense (pre-tax) |  |  |  |
Amounts reclassified from accumulated other comprehensive income (loss): |  |  |  |
Pre-tax |  |  | 5.3 | (0.4)
Other interest expense, net (pre-tax) |  |  |  |
Amounts reclassified from accumulated other comprehensive income (loss): |  |  |  |
Pre-tax |  |  | 1.7 | (0.4)
Realized (gain) loss on interest rate swap termination (pre-tax) |  |  |  |
Amounts reclassified from accumulated other comprehensive income (loss): |  |  |  |
Pre-tax |  |  | 0.1 | (0.1)
Accumulated other comprehensive income (loss) |  |  |  |
Increase (Decrease) in AOCI [Roll Forward] |  |  |  |
BALANCE | (213.3) | (152.5) | (147.0) | (137.8)
Amounts reclassified from accumulated other comprehensive income (loss): |  |  |  |
Net current period other comprehensive income (loss) | 7.0 | (17.0) | (59.3) | (31.7)
BALANCE | (206.3) | (169.5) | (206.3) | (169.5)
Accumulated income (loss) on foreign currency translation |  |  |  |
Increase (Decrease) in AOCI [Roll Forward] |  |  |  |
BALANCE |  |  | (142.9) | (146.7)
Other comprehensive income (loss) before reclassifications: |  |  |  |
Pre-tax |  |  | (24.4) | (12.0)
Tax effect |  |  | 0.0 | 0.0
Amounts reclassified from accumulated other comprehensive income (loss): |  |  |  |
Provision (benefit) for income taxes |  |  | 0.0 | 0.0
Net current period other comprehensive income (loss) |  |  | (24.4) | (12.0)
BALANCE | (167.2) | (158.7) | (167.2) | (158.7)
Accumulated income (loss) on foreign currency translation | Floorplan interest expense (pre-tax) |  |  |  |
Amounts reclassified from accumulated other comprehensive income (loss): |  |  |  |
Pre-tax |  |  | 0.0 | 0.0
Accumulated income (loss) on foreign currency translation | Other interest expense, net (pre-tax) |  |  |  |
Amounts reclassified from accumulated other comprehensive income (loss): |  |  |  |
Pre-tax |  |  | 0.0 | 0.0
Accumulated income (loss) on foreign currency translation | Realized (gain) loss on interest rate swap termination (pre-tax) |  |  |  |
Amounts reclassified from accumulated other comprehensive income (loss): |  |  |  |
Pre-tax |  |  | 0.0 | 0.0
Accumulated income (loss) on interest rate swaps |  |  |  |
Increase (Decrease) in AOCI [Roll Forward] |  |  |  |
BALANCE |  |  | (4.1) | 8.9
Other comprehensive income (loss) before reclassifications: |  |  |  |
Pre-tax |  |  | (51.3) | (25.2)
Tax effect |  |  | 10.9 | 6.0
Amounts reclassified from accumulated other comprehensive income (loss): |  |  |  |
Provision (benefit) for income taxes |  |  | (1.7) | 0.2
Net current period other comprehensive income (loss) |  |  | (35.0) | (19.7)
BALANCE | $ (39.1) | $ (10.8) | (39.1) | (10.8)
Accumulated income (loss) on interest rate swaps | Floorplan interest expense (pre-tax) |  |  |  |
Amounts reclassified from accumulated other comprehensive income (loss): |  |  |  |
Pre-tax |  |  | 5.3 | (0.4)
Accumulated income (loss) on interest rate swaps | Other interest expense, net (pre-tax) |  |  |  |
Amounts reclassified from accumulated other comprehensive income (loss): |  |  |  |
Pre-tax |  |  | 1.7 | $ (0.4)
Accumulated income (loss) on interest rate swaps | Realized (gain) loss on interest rate swap termination (pre-tax) |  |  |  |
Amounts reclassified from accumulated other comprehensive income (loss): |  |  |  |
Pre-tax |  |  | $ 0.1 |

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