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SEGMENT AND RELATED INFORMATION - Schedule of Assets by Geographical Region (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Segment Reporting Information [Line Items] |  |
Total | $ 119.0 | $ 83.4
Cash, cash equivalents, and marketable investment securities | 140.9 | 169.7
Total | 1,146.5 | 1,198.7
Reportable geographical components |  |
Segment Reporting Information [Line Items] |  |
Total | 119.0 | 83.4
Total | 1,005.6 | 1,029.0
Reportable geographical components | United States |  |
Segment Reporting Information [Line Items] |  |
Total | 117.7 | 81.9
Total | 961.6 | 983.4
Reportable geographical components | Rest of world |  |
Segment Reporting Information [Line Items] |  |
Total | 1.3 | 1.5
Total | $ 44.0 | $ 45.6

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