XML 40 R27.htm IDEA: XBRL DOCUMENT
v3.20.2

Investments in Marketable Securities (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2020
Marketable Securities [Abstract] |
Schedule of Investments in Marketable Securities | The following is a summary of the cost, gross unrealized gains, gross unrealized losses and fair value of Investments in marketable securities:
|  |  |  |  | December 31, 2019 |  | September 30, 2020
Cost |  |  |  |  | $ | 57.9 |  |  | $ | 67.5 |
Unrealized gains |  |  |  |  | 2.1 |  |  | 2.4 |
Unrealized losses |  |  |  |  | (0.6) |  |  | (1.7) |
Fair value |  |  |  |  | $ | 59.4 |  |  | $ | 68.2 |

X
- References No definition available. + Details
Name: | us-gaap_MarketableSecuritiesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of marketable securities. This may consist of investments in certain debt and equity securities, short-term investments and other assets. + References No definition available. + Details
Name: | us-gaap_MarketableSecuritiesTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration