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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - Reclassification (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2023
Mar. 31, 2023
Jun. 30, 2024
Jun. 30, 2023
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]            
Cost of sales $ 851.6   $ 909.0   $ 1,695.0 $ 1,868.2
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Amortization of Prior Service Cost (Credit), Statement of Income or Comprehensive Income [Extensible Enumeration]         Other Nonoperating Income (Expense) Other Nonoperating Income (Expense)
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]         Other Nonoperating Income (Expense) Other Nonoperating Income (Expense)
Income before income taxes 47.5   374.1   $ 117.6 $ 439.7
Provision for income taxes 20.3   (25.1)   25.7 (41.8)
Net income 67.8 $ 75.5 349.0 $ 48.9 143.3 397.9
Pension & Other Postretirement Benefit Plans, Net | Reclassified from AOCI to net income (loss)            
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]            
Income before income taxes (0.6)   (1.1)   (1.1) (0.7)
Provision for income taxes 0.2   0.3   0.3 0.2
Net income $ (0.4)   $ (0.8)   $ (0.8) $ (0.5)
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent [Member]            
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]            
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Amortization of Prior Service Cost (Credit), Statement of Income or Comprehensive Income [Extensible Enumeration] Other Nonoperating Income (Expense)   Other Nonoperating Income (Expense)   Other Nonoperating Income (Expense) Other Nonoperating Income (Expense)
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent [Member] | Reclassified from AOCI to net income (loss)            
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]            
Prior service credit $ (0.1)   $ (0.1)   $ (0.2)  
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member]            
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]            
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Amortization of Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Other Nonoperating Income (Expense)   Other Nonoperating Income (Expense)   Other Nonoperating Income (Expense) Other Nonoperating Income (Expense)
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent [Member] | Reclassified from AOCI to net income (loss)            
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]            
Net actuarial loss $ (0.5)   $ (1.0)   $ (0.9) $ (0.7)
Cash Flow Hedges, Net | Reclassified from AOCI to net income (loss)            
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]            
Income before income taxes 2.8   9.7   7.6 16.1
Provision for income taxes (0.3)   (1.0)   (0.8) (1.6)
Net income 2.5   8.7   6.8 14.5
Cash Flow Hedges, Net | Reclassified from AOCI to net income (loss) | Commodity Contract            
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]            
Cost of sales $ 2.8   $ 9.7   $ 7.6 $ 16.1