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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

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- Definition

Tabular disclosure of marketable securities. This may consist of investments in certain debt and equity securities, short-term investments and other assets.

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