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SEGMENT INFORMATION - Narrative (Details) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 USD ($) | Jun. 30, 2020 USD ($) | Jun. 30, 2021 USD ($) segment | Jun. 30, 2020 USD ($) segment
Segment Reporting Information |  |  |  |
Number of reportable segments | segment |  |  | 3 | 3
Asset impairments | $ 0.0 | $ 23.8 | $ 0.0 | $ 23.8
Loss on extinguishment of debt | 0.0 | 10.4 | 0.0 | 10.4
U.S. |  |  |  |
Segment Reporting Information |  |  |  |
Net pre-tax gain (loss) on dealership dispositions |  |  | 1.8 |
Asset impairments |  |  | 2.2 |
Gain (loss) on legal matters |  |  | 1.0 |
Share-based Payment Arrangement, Expense |  | 10.6 |  | 10.6
Loss on extinguishment of debt |  | 10.4 |  | 10.4
U.S. | Interest Rate Swaps |  |  |  |
Segment Reporting Information |  |  |  |
Loss of derivative instruments | 2.3 |  | 2.3 |
U.S. | Dealership |  |  |  |
Segment Reporting Information |  |  |  |
Net pre-tax gain (loss) on dealership dispositions | $ 0.8 |  | 1.7 |
U.K. |  |  |  |
Segment Reporting Information |  |  |  |
Net pre-tax gain (loss) on dealership dispositions |  |  | $ (0.6) |
Asset impairments |  | 12.8 |  | 12.8
Severance expense |  | 1.2 |  | 1.2
Brazil |  |  |  |
Segment Reporting Information |  |  |  |
Asset impairments |  | $ 11.1 |  | 11.1
Severance expense |  |  |  | $ 0.9

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