XML 53 R27.htm IDEA: XBRL DOCUMENT v3.20.2
Investments in Marketable Securities (Tables)
 6 Months Ended
Jun. 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
 
June 30,
2020
Cost
$
57.9

 
$
62.3

Unrealized gains
2.1

 
1.7

Unrealized losses
(0.6
)
 
(2.6
)
Fair value
$
59.4

 
$
61.4