XML 37 R25.htm IDEA: XBRL DOCUMENT

SHORT-TERM INVESTMENTS: (Tables)

6 Months Ended

Jun. 30, 2023

SHORT-TERM INVESTMENTS:

Schedule of short-term investments

Short-term investments were as follows (in millions):


		At June 30,			At December 31,
		2023			2022
Trading securities		$	—		$	208.0
Weighted average interest rate			—	%		4.5	%

Available-for-sale		$	0.3		$	0.3
Weighted average interest rate			0.8	%		0.8	%
Total		$	0.3		$	208.3

Summary of activity investments

The following table summarizes the activity of these investments by category (in millions):


		Three months ended						Six months ended
		June 30,						June 30,
		2023			2022			2023			2022
Trading:
Interest earned		$	3.5		$	1.1		$	6.9		$	1.4
Unrealized gain (loss) at the end of the period		$	(*)		$	(*)		$	(*)		$	(*)

Available-for-sale:
Interest earned		$	(*)		$	(*)		$	(*)		$	(*)
Investment redeemed		$	—		$	0.1		$	—		$	0.1

(*) Less than $0.1 million.