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FAIR VALUE MEASUREMENTS - LEVEL 3 RECONCILIATION (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Level 3 rollforward        
Balance at the beginning of the period $ 0.4 $ 0.6 $ 2.0 $ 2.0
Purchases 7.2 8.2 7.2 8.2
Settlements (1.3) (2.0) (2.9) (3.4)
Balance at the end of the period $ 6.3 $ 6.8 $ 6.3 $ 6.8