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Acquisitions (Tables) | 12 Months Ended
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Dec. 31, 2021
Business Combination and Asset Acquisition [Abstract] |
Schedule of Business Acquisitions, by Acquisition | The following is a summary of the Company's acquisitions (in millions).
|  | Year Ended December 31,
|  | 2021 |  | 2020 |  | 2019
Number of businesses acquired |  | Three |  | Four |  | Two
Aggregate purchase price |  | $ | 221.3 |  |  | $ | 186.0 |  |  | $ | 113.0 |
Maximum earn out |  | 15.0 |  |  | 19.0 |  |  | — |
Earn out liability at December 31, 2021 |  | 7.0 |  |  | 8.1 |  |  | — |
Status of purchase accounting |  | Open |  | Closed |  | Closed
___ Generally, working capital adjustments account for the difference between the aggregate purchase price and cash paid, net of cash acquired in the accompanying statements of cash flows.

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- Definition Tabular disclosure of a material business combination completed during the period, including background, timing, and recognized assets and liabilities. This table does not include leveraged buyouts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1486-128463 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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