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RETIREMENT BENEFIT PLANS - Schedule of Benefit Obligations in Excess of Plan Assets (Details) - Retirement Plans - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]    
Accumulated and projected benefit obligation $ 64.8 $ 574.2
Fair value of plan assets $ 46.2 $ 572.3