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Discontinued Operations - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Jul. 01, 2020
Mar. 31, 2021
Mar. 31, 2020
Dec. 31, 2020
Oct. 31, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Tangible asset impairment charges   $ 0.8 $ 2.5    
Gain on sale of business   $ 0.0 $ (2.9)    
Discontinued Operations, Held-for-sale | United States Book Business, Versailles Kentucky Book Manufacturing Plant          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Discontinued operation, cash consideration $ 7.0        
Liabilities assumed $ 3.0        
Tangible asset impairment charges       $ 10.1  
Gain on sale of business       3.0  
Discontinued Operations, Held-for-sale | United States Book Business, Fairfield Pennsylvania And Martinsburg West Virginia Book Manufacturing Plants          
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]          
Discontinued operation, cash consideration         $ 14.2
Gain on sale of business       (3.5)  
Goodwill impairment       $ 1.4