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RETIREMENT PLANS AND OTHER BENEFITS (Tables)
6 Months Ended
Jun. 30, 2024
Retirement Benefits [Abstract]  
Schedule of Components of Net Periodic Cost Information regarding the Company’s plans, including the U.S. SERP, is as follows (in millions):
 
Three Months Ended
June 30,
Six Months Ended
June 30,
 2024202320242023
U.S. PensionNon-U.S. PensionOtherU.S. PensionNon-U.S. PensionOtherU.S. PensionNon-U.S. PensionOtherU.S. PensionNon-U.S. PensionOther
Components of net periodic cost:
  
Service cost$— $0.3 $— $— $0.1 $— $— $0.6 $— $— $0.3 $— 
Interest cost0.4 1.1 — 0.5 1.1 — 0.8 2.2 — 0.9 2.2 — 
Expected return on plan assets
— (0.9)— — (0.8)— — (1.8)— — (1.6)— 
Amortization of prior service cost
— 0.1 — — 0.1 — — 0.1 — — 0.1 — 
Amortization of actuarial (gain) loss
(0.1)0.6 — (0.1)0.5 — (0.1)1.3 — (0.1)1.1 — 
Net periodic cost $0.3 $1.2 $— $0.4 $1.0 $— $0.7 $2.4 $— $0.8 $2.1 $—