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Acquisitions - Summary of Acquisitions (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Business Acquisition [Line Items] |  |  |
Cash paid, net of cash acquired | $ 1,503.1 | $ 366.6 |
Contingent consideration | 4.6 | 0.0 |
Debt and finance lease obligations | 218.9 | 26.4 |
Total | 1,726.6 | 393.0 |
Other liabilities | (8.5) | (29.3) |
Goodwill | 593.0 | 454.6 | $ 434.9
2020 Acquisitions |  |  |
Business Acquisition [Line Items] |  |  |
Trade receivables, net | 0.2 |  |
Inventories | 358.9 |  |
Property and equipment | 529.9 |  |
Other assets | 858.4 |  |
Floor plan notes payable | (13.1) |  |
Assets acquired and liabilities assumed, excluding goodwill | 1,725.8 |  |
Goodwill | 0.8 |  |
Assets acquired and liabilities assumed, net | $ 1,726.6 |  |
Acquisitions 2019 |  |  |
Business Acquisition [Line Items] |  |  |
Trade receivables, net |  | 0.0 |
Inventories |  | 105.2 |
Property and equipment |  | 124.0 |
Other assets |  | 193.1 |
Floor plan notes payable |  | 0.0 |
Assets acquired and liabilities assumed, excluding goodwill |  | 393.0 |
Goodwill |  | 0.0 |
Assets acquired and liabilities assumed, net |  | $ 393.0 |

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