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LEASES - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Lessee, Lease, Description [Line Items]      
Operating lease cost $ 30.5 $ 27.9 $ 27.0
Lease commitments for leases not yet commenced $ 0.0    
Minimum      
Lessee, Lease, Description [Line Items]      
Lease term 1 year    
Maximum      
Lessee, Lease, Description [Line Items]      
Lease term 20 years