Annual report pursuant to Section 13 and 15(d)

BENEFIT PLANS - Net Amounts Recognized, or Funded Status of Pension and Other Postretirement Benefit Plans (Details)

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BENEFIT PLANS - Net Amounts Recognized, or Funded Status of Pension and Other Postretirement Benefit Plans (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Amounts recognized in the statements of financial position consist of:    
Long-term liabilities $ (130.1) $ (130.7)
Pension Benefits    
Amounts recognized in the statements of financial position consist of:    
Current liabilities (6.8) (6.8)
Long-term liabilities (124.6) (121.3)
Funded status of plan (131.4) (128.1)
Other Benefits    
Amounts recognized in the statements of financial position consist of:    
Current liabilities (0.1) (0.1)
Long-term liabilities (2.0) (4.8)
Funded status of plan $ (2.1) $ (4.9)