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Fair Value Measurements (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Mar. 31, 2019 | Dec. 31, 2019
Fair Value Measurements [Abstract] |  |
Investments | $ 6.0 | $ 4.4
Deferred compensation obligations | 6.0 | $ 4.4
Decrease in fair value of investments | (1.6) |
Decrease in fair value of deferred compensation obligations | $ (1.6) |

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- Definition Amount of increase (decrease) of investment in debt and equity securities, measured at fair value with changes in fair value recognized in net income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 19 -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3444-108585 + Details
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