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Long-Term Debt (Revolving Credit Facility) (Details) - USD ($)
3 Months Ended 12 Months Ended
Sep. 06, 2013
Mar. 30, 2018
Dec. 31, 2017
Nov. 15, 2016
Dec. 31, 2012
Jul. 22, 2011
Debt Instrument [Line Items]            
Outstanding borrowings   $ 1,169,400,000 $ 1,085,700,000      
Outstanding letters of credit   $ 41,700,000        
Revolving Credit Facility            
Debt Instrument [Line Items]            
Credit facility maximum borrowing capacity $ 1,000,000,000.0     $ 700,000,000 $ 700,000,000 $ 400,000,000
Increase, additional borrowings $ 250,000,000          
Capital expenditures to fixed charges ratio 100.00%          
Threshold for line of credit facility percentage of asset based revolving credit facilities 10.00%          
Equity interest pledged in all domestic subsidiaries, percentage   100.00%        
Equity interest pledged   65.00%        
Non-voting equity interest pledged in certain foreign subsidiaries, percentage   100.00%        
Outstanding borrowings   $ 355,200,000 259,500,000      
Total credit under facility   700,000,000 700,000,000      
Undrawn availability   $ 255,100,000 $ 326,200,000      
Interest rate   3.10% 2.80%      
Outstanding letters of credit   $ 39,400,000 $ 24,600,000      
Original issuance   Jul. 31, 2011 Jul. 31, 2011      
Maturity date   May 31, 2022 May 31, 2022      
Revolving Credit Facility | Minimum            
Debt Instrument [Line Items]            
Threshold for line of credit facility borrowings $ 70,000,000          
Commitment fee percentage   0.25%        
Undrawn availability   $ 70,000,000        
Revolving Credit Facility | Maximum            
Debt Instrument [Line Items]            
Commitment fee percentage   0.375%        
Revolving Credit Facility | Europe            
Debt Instrument [Line Items]            
Credit facility maximum borrowing capacity       210,000,000    
Outstanding borrowings   $ 87,500,000 $ 39,600,000      
Revolving Credit Facility | United States            
Debt Instrument [Line Items]            
Credit facility maximum borrowing capacity       441,000,000    
Revolving Credit Facility | Canada            
Debt Instrument [Line Items]            
Credit facility maximum borrowing capacity       $ 49,000,000