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FAIR VALUE MEASUREMENTS - LEVEL 3 RECONCILIATION (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Level 3 rollforward    
Balance at the beginning of the period $ 7.2 $ 7.8
Purchases 1.0 0.3
Realized and unrealized net losses included in earnings (0.8) (0.3)
Settlements (4.8) (4.8)
Balance at the end of the period 2.6 3.0
Unrealized net gains (losses) included in earnings attributable to level 3 derivatives held at the end of the reporting period $ 0.1 $ (0.1)