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RETIREMENT PLANS AND OTHER BENEFITS (Tables)
6 Months Ended
Jun. 30, 2021
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,
 2021202020212020
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 $— $— $0.3 $— $— $0.5 $— $— $0.6 $— 
Interest cost0.3 0.6 — 0.4 0.6 0.1 0.6 1.2 — 0.7 1.3 0.1 
Expected return on plan assets
— (1.5)— — (1.3)— — (2.9)— — (2.6)— 
Amortization of actuarial (gain) loss
0.1 0.6 — — 0.5 — 0.2 1.2 — — 1.0 — 
Net periodic cost $0.4 $— $— $0.4 $0.1 $0.1 $0.8 $— $— $0.7 $0.3 $0.1