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FAIR VALUE MEASUREMENTS - LEVEL 3 RECONCILIATION (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Level 3 rollforward      
Balance at the beginning of the period $ 1.4 $ 1.2 $ 1.3
Purchases 11.7 3.1 4.1
Settlements (9.0) (2.9) (4.2)
Balance at the end of the period $ 4.1 $ 1.4 $ 1.2