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Investments (Tables) | 12 Months Ended
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Dec. 31, 2020
Investments, All Other Investments [Abstract] |
Summary of Investments | The following table summarizes the components of investments:
| December 31,
| 2020 |  | 2019
Investment in equity securities | $ | 73.6 |  |  | $ | 6.9 |
Equity investments | 5.3 |  |  | 6.5 |
Total investments | $ | 78.9 |  |  | $ | 13.4 |

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- Definition Tabular disclosure of investment. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 325 -URI http://asc.fasb.org/topic&trid=2197064 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 321 -URI http://asc.fasb.org/topic&trid=75115024 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 323 -URI http://asc.fasb.org/topic&trid=2196965 + Details
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