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INCOME TAX EXPENSE - Current and deferred tax expense (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Current tax expense    
Current period $ 132.4 $ 154.2
Settlement or adjustment for prior periods (0.1) (2.3)
Deferred tax expense    
Origination and reversal of temporary differences (77.5) (61.1)
Change in unrecognized deferred tax assets from impairment and asset derecognition charges 32.9 0.3
Change in unrecognized deferred tax assets (11.6) 23.9
Total tax expense $ 76.1 $ 115.0