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Employee Retirement Plans (Multiemployer Pension Plans) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]    
Other restructuring charges (income) $ (26.5) $ 22.0
Multiemployer plans, plan contributions 6.2 11.4
Withdrawal liability 32.2  
Other Noncurrent Liabilities    
Defined Benefit Plan Disclosure [Line Items]    
Withdrawal liability 28.4 32.2
Accrued Liabilities    
Defined Benefit Plan Disclosure [Line Items]    
Withdrawal liability $ 3.8 $ 3.5
Graphics Communications International Union Employer Retirement Fund    
Defined Benefit Plan Disclosure [Line Items]    
Funded percentage of plan (less than) 65.00%  
Graphics Communications Conference of the International Brotherhood of Teamsters National PensionFund    
Defined Benefit Plan Disclosure [Line Items]    
Funded percentage of plan (less than) 65.00%