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Financial Instruments and Fair Value Measurement - Additional Information (Details) - USD ($)
3 Months Ended 6 Months Ended
Dec. 31, 2018
Sep. 30, 2018
Mar. 31, 2020
Mar. 31, 2019
Jun. 30, 2021
Dec. 31, 2019
Derivative [Line Items]            
Fair value of long-term debt     $ 3,188,500,000     $ 2,788,600,000
Carrying value of long-term debt     3,360,600,000     2,729,300,000
Anticipated reclassification of loss to earnings in the next twelve months     8,600,000      
Derivative Contracts Designated as Hedging Instruments | Instruments in a Cash Flow Hedging Relationship | Interest Rate Swap Agreements            
Derivative [Line Items]            
Amounts excluded from effectiveness     0 $ 0    
Amounts excluded from the measure of effectiveness     0 0    
Derivative Contracts Designated as Hedging Instruments | Instruments in a Cash Flow Hedging Relationship | Commodity Contracts            
Derivative [Line Items]            
Amounts excluded from effectiveness     0 0    
Amounts excluded from the measure of effectiveness     $ 0 0    
Percentage of expected natural gas usage hedged     50.00%      
Derivative Contracts Designated as Hedging Instruments | Instruments in a Cash Flow Hedging Relationship | Forward currency contract            
Derivative [Line Items]            
Amounts excluded from effectiveness     $ 0 0    
Amounts excluded from the measure of effectiveness     0 0    
Amounts forecasted and reclassified into earnings no longer probable     0 $ 0    
Notional Amount     62,300,000     87,600,000
Derivative Contracts Not Designated as Hedging Instruments | Maximum            
Derivative [Line Items]            
Foreign currency forward exchange contract term 3 months 3 months        
Derivative Contracts Not Designated as Hedging Instruments | Forward currency contract            
Derivative [Line Items]            
Notional Amount     $ 76,100,000     $ 77,400,000
Forecast | Instruments in a Cash Flow Hedging Relationship | Commodity Contracts            
Derivative [Line Items]            
Percentage of expected natural gas usage hedged         36.00%