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Business Combinations (Tables) | 6 Months Ended
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Jun. 30, 2020
Business Combinations |
Summary of the aggregate consideration paid and the aggregate amounts of the assets acquired and liabilities assumed | ​
​ | ​ | ​ | ​ | ​
​ | ​ | June 30, | ​
​ |  | 2019 |
Accounts receivable | ​ | $ | — | ​
Inventories | ​ | ​ | 0.5 | ​
Other current assets | ​ |  | — | ​
Property and equipment | ​ |  | 0.2 | ​
Indefinite-lived intangibles | ​ |  | 0.4 | ​
Other noncurrent assets | ​ | ​ | 0.1 | ​
Current liabilities | ​ |  | (0.1) | ​
Noncurrent liabilities | ​ |  | — | ​
Total cash used in acquisitions | ​ | $ | 1.1 | ​
Summary of unaudited consolidated pro forma results of operations | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | Six Months Ended | ​
​ |  | June 30, 2019 | ​ | June 30, 2019 | ​
Revenues | ​ | $ | 6,036.2 |  | $ | 11,880.9 |
Income from continuing operations | ​ |  | 122.5 | ​ |  | 226.6 | ​
Net income | ​ |  | 122.6 | ​ |  | 226.8 | ​
Income from continuing operations per diluted common share | ​ | $ | 1.48 | ​ | $ | 2.71 | ​
Net income per diluted common share | ​ | $ | 1.48 | ​ | $ | 2.71 | ​

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