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Property, Plant, and Equipment - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2021
Jun. 30, 2020
Dec. 31, 2020
May 31, 2020
Depreciation [Abstract]            
Depreciation expense $ 94.5 $ 93.3 $ 184.5 $ 183.1    
Incremental depreciation     2.1 $ 2.6    
Purchases of property, plant, and equipment included in accounts payable     $ 41.4   $ 20.4  
Paper            
Property, Plant, And Equipment [Line Items]            
Recoverability test results recoverable percentage           100.00%