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Acquisitions - Summary of Acquisitions (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Business Acquisition [Line Items] |  |  |
Cash paid, net of cash acquired | $ 373.8 | $ 460.4 | $ 234.7
Equity securities issued | 0.0 | 2.1 | 0.0
Debt issued | 125.1 | 1.8 |
Total | 498.9 | 464.3 |
Goodwill | 434.9 | 256.3 | $ 259.4
Acquisitions 2018 |  |  |
Business Acquisition [Line Items] |  |  |
Trade receivables, net | 0.7 |  |
Inventories | 180.0 |  |
Franchise value | 29.8 |  |
Property and equipment | 179.7 |  |
Other assets | 48.6 |  |
Floor plan notes payable | (10.8) |  |
Debt and capital lease obligations | 0.0 |  |
Deferred taxes, net | 0.0 |  |
Other liabilities | (2.3) |  |
Assets acquired and liabilities assumed, excluding goodwill | 425.7 |  |
Goodwill | 73.2 |  |
Assets acquired and liabilities assumed, net | $ 498.9 |  |
Acquisitions 2017 |  |  |
Business Acquisition [Line Items] |  |  |
Trade receivables, net |  | 46.9 |
Inventories |  | 189.8 |
Franchise value |  | 73.7 |
Property and equipment |  | 166.0 |
Other assets |  | 18.3 |
Floor plan notes payable |  | (72.5) |
Debt and capital lease obligations |  | (38.7) |
Deferred taxes, net |  | (2.0) |
Other liabilities |  | (24.7) |
Assets acquired and liabilities assumed, excluding goodwill |  | 356.8 |
Goodwill |  | 107.5 |
Assets acquired and liabilities assumed, net |  | $ 464.3 |

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- Definition Amount due from customers or clients for goods or services, including trade receivables, that have been delivered or sold in the normal course of business, and amounts due from others, including related parties expected to be converted to cash, sold or exchanged within one year or the normal operating cycle, if longer, acquired at the acquisition date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472 + Details
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