XML 41 R28.htm IDEA: XBRL DOCUMENT
v3.22.2.2

Investments in Marketable Securities (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2022
Marketable Securities [Abstract] |
Schedule of Investments in Marketable Securities | The following table summarizes the cost, gross unrealized gains, gross unrealized losses, and fair value of investments in equity securities:
|  |  |  |  | December 31, 2021 |  | September 30, 2022
Cost |  |  |  |  | $ | 59.1 |  |  | $ | 73.8 |
Unrealized gains |  |  |  |  | 8.1 |  |  | 10.5 |
Unrealized losses |  |  |  |  | (2.7) |  |  | (10.9) |
Fair value |  |  |  |  | $ | 64.5 |  |  | $ | 73.4 |
The following table summarizes the cost, gross unrealized losses, and fair value of investments in U.S. Treasury Notes classified as available-for-sale, which mature in 2024, and other debt securities classified as trading:
|  |  |  |  | December 31, 2021 |  | September 30, 2022
Cost |  |  |  |  | $ | 14.1 |  |  | $ | 113.4 |
Unrealized losses |  |  |  |  | (0.1) |  |  | (3.1) |
Fair value |  |  |  |  | $ | 14.0 |  |  | $ | 110.3 |

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: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration