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INVESTMENTS (Tables)
 3 Months Ended
Mar. 31, 2025
Investments, Debt and Equity Securities [Abstract]  
Schedule of Marketable Debt Securities Marketable debt securities accounted for as AFS, and recorded within Other current assets in the Consolidated
Balance Sheets, were as follows:
As of March 31, 2025
Fair Value of Securities with Contractual
Maturities
(in millions)
Amortized
Cost
Total Net
Gains1
Total Net
Losses1
Fair Value
Within 1
Year
After 1 Year
through 5
Years
After 5
Years
U.S. Treasury
$19.9
$0.1
$—
$20.0
$3.5
$13.3
$3.2
Municipal securities
10.0
0.1
—
10.1
1.5
7.1
1.5
Corporate debt
21.3
0.1
—
21.4
4.3
14.1
3.0
Total
$51.2
$0.3
$—
$51.5
$9.3
$34.5
$7.7
As of December 31, 2024
Fair Value of Securities with Contractual
Maturities
(in millions)
Amortized
Cost
Total Net
Gains1
Total Net
Losses1
Fair Value
Within 1
Year
After 1 Year
through 5
Years
After 5
Years
U.S. Treasury
$20.4
$—
$(0.2)
$20.2
$3.4
$13.8
$3.1
Municipal securities
10.0
—
—
10.0
1.5
7.0
1.5
Corporate debt
21.0
—
(0.1)
20.9
4.2
13.7
2.9
Total
$51.4
$—
$(0.3)
$51.1
$9.1
$34.5
$7.5
1Represents total unrealized gains (losses) for securities with net gains (losses) in accumulated other comprehensive
income.