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Investments in Marketable Securities (Tables)

9 Months Ended

Sep. 30, 2018

Marketable Securities [Abstract]

Schedule of Investments in Marketable Securities

The following is a summary of the cost, gross unrealized gains and losses and fair value of Investments in marketable securities:

	December 31, 2017				September 30, 2018
Cost	$	67.1			$	128.3
Unrealized gains	13.0				15.8
Unrealized losses	(2.3		)		(0.0		)
Fair value	$	77.8			$	144.1

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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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