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FAIR VALUE MEASUREMENTS - LEVEL 3 RECONCILIATION (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Level 3 rollforward    
Balance at the beginning of the period $ 2.4 $ 2.4
Purchases 0.0 0.1
Settlements (1.4) (1.6)
Balance at the end of the period $ 1.0 $ 0.9