XML 148 R124.htm IDEA: XBRL DOCUMENT v3.20.4
FAIR VALUE MEASUREMENTS (Measured on Recurring Basis) (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Fair Value, Measurements, Recurring [Member] | Commodity contract [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative Liability, Fair Value, Amount Not Offset Against Collateral $ 9.0 $ 33.8  
Derivative, Collateral, Right to Reclaim Cash (6.0) (33.8)  
Derivative Liability 3.0 0.0  
Fair Value, Measurements, Recurring [Member] | Commodity contract [Member] | Level 1 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative Liability, Fair Value, Amount Not Offset Against Collateral 2.3 32.8  
Fair Value, Measurements, Recurring [Member] | Commodity contract [Member] | Level 2 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative Liability, Fair Value, Amount Not Offset Against Collateral 6.7 1.0  
Fair Value, Measurements, Recurring [Member] | Commodity contract [Member] | Level 3 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative Liability, Fair Value, Amount Not Offset Against Collateral 0.0 0.0  
Fair Value, Measurements, Recurring [Member] | Catalyst lease obligations [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative, Collateral, Right to Reclaim Cash 0.0 0.0  
Obligations, Fair Value Disclosure 102.5 47.6  
Fair Value, Measurements, Recurring [Member] | Catalyst lease obligations [Member] | Level 1 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Obligations, Fair Value Disclosure 0.0 0.0  
Fair Value, Measurements, Recurring [Member] | Catalyst lease obligations [Member] | Level 2 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Obligations, Fair Value Disclosure 102.5 47.6  
Fair Value, Measurements, Recurring [Member] | Catalyst lease obligations [Member] | Level 3 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Obligations, Fair Value Disclosure 0.0 0.0  
Fair Value, Measurements, Recurring [Member] | Contingent Consideration [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative, Collateral, Right to Reclaim Cash 0.0 0.0  
Obligations, Fair Value Disclosure 12.1 26.1  
Fair Value, Measurements, Recurring [Member] | Contingent Consideration [Member] | Level 1 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Obligations, Fair Value Disclosure 0.0 0.0  
Fair Value, Measurements, Recurring [Member] | Contingent Consideration [Member] | Level 2 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Obligations, Fair Value Disclosure 0.0 0.0  
Fair Value, Measurements, Recurring [Member] | Contingent Consideration [Member] | Level 3 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Obligations, Fair Value Disclosure 12.1 26.1  
Fair Value, Measurements, Recurring [Member] | Inventory Intermediation Agreement Obligation [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative Liability, Fair Value, Amount Not Offset Against Collateral   1.3  
Derivative, Collateral, Right to Reclaim Cash   0.0  
Derivative Liability   1.3  
Fair Value, Measurements, Recurring [Member] | Inventory Intermediation Agreement Obligation [Member] | Level 1 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative Liability, Fair Value, Amount Not Offset Against Collateral   0.0  
Fair Value, Measurements, Recurring [Member] | Inventory Intermediation Agreement Obligation [Member] | Level 2 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative Liability, Fair Value, Amount Not Offset Against Collateral   1.3  
Fair Value, Measurements, Recurring [Member] | Inventory Intermediation Agreement Obligation [Member] | Level 3 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative Liability, Fair Value, Amount Not Offset Against Collateral   0.0  
Fair Value, Measurements, Recurring [Member] | Money market funds [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Cash and Cash Equivalents, Fair Value Disclosure 411.6 111.8  
Fair Value, Measurements, Recurring [Member] | Money market funds [Member] | Level 1 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Cash and Cash Equivalents, Fair Value Disclosure 411.6 111.8  
Fair Value, Measurements, Recurring [Member] | Money market funds [Member] | Level 2 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Cash and Cash Equivalents, Fair Value Disclosure 0.0 0.0  
Fair Value, Measurements, Recurring [Member] | Money market funds [Member] | Level 3 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Cash and Cash Equivalents, Fair Value Disclosure 0.0 0.0  
Fair Value, Measurements, Recurring [Member] | Commodity contract [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative Asset, Fair Value, Amount Not Offset Against Collateral 6.0 34.0  
Derivative, Collateral, Obligation to Return Cash (6.0) (33.8)  
Derivative Asset 0.0 0.2  
Fair Value, Measurements, Recurring [Member] | Commodity contract [Member] | Level 1 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative Asset, Fair Value, Amount Not Offset Against Collateral 2.5 32.5  
Fair Value, Measurements, Recurring [Member] | Commodity contract [Member] | Level 2 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative Asset, Fair Value, Amount Not Offset Against Collateral 3.5 1.5  
Fair Value, Measurements, Recurring [Member] | Commodity contract [Member] | Level 3 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative Asset, Fair Value, Amount Not Offset Against Collateral 0.0 0.0  
Fair Value, Measurements, Recurring [Member] | Inventory Intermediation Agreement Obligation [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative Asset, Fair Value, Amount Not Offset Against Collateral 11.3    
Derivative, Collateral, Obligation to Return Cash 0.0    
Derivative Asset 11.3    
Fair Value, Measurements, Recurring [Member] | Inventory Intermediation Agreement Obligation [Member] | Level 1 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative Asset, Fair Value, Amount Not Offset Against Collateral 0.0    
Fair Value, Measurements, Recurring [Member] | Inventory Intermediation Agreement Obligation [Member] | Level 2 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative Asset, Fair Value, Amount Not Offset Against Collateral 11.3    
Fair Value, Measurements, Recurring [Member] | Inventory Intermediation Agreement Obligation [Member] | Level 3 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative Asset, Fair Value, Amount Not Offset Against Collateral 0.0    
Pension Benefits [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 255.8 197.4 $ 143.4
Pension Benefits [Member] | Level 1 [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets, Amount 255.8 197.4  
Pension Benefits [Member] | Other Assets [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Defined Benefit Plan, Plan Assets, Amount $ 21.2 $ 10.3