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FAIR VALUE MEASUREMENTS (Change in Fair Value at Level 3) (Details) - USD ($)
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Fair Value, Measurement with Unobservable Inputs Reconciliation, Liability, Transfers Into Level 3 $ 0 $ 0  
Qualified Plan      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Defined Benefit Plan, Plan Assets, Amount 306,300,000 255,800,000 $ 197,400,000
Other Assets [Member] | Qualified Plan      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Defined Benefit Plan, Plan Assets, Amount 20,700,000 21,200,000  
Contingent Consideration [Member]      
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]      
Balance at beginning of period 12,100,000 26,100,000  
Additions 0 77,300,000  
Accretion on discounted liabilities 0 3,800,000  
Settlements (12,200,000) (3,000,000.0)  
Unrealized loss (gain) included in earnings 32,400,000 (92,100,000)  
Balance at end of period $ 32,300,000 $ 12,100,000