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Short-term and Long-term Debt - Narrative (Detail)
3 Months Ended 9 Months Ended
Sep. 16, 2019
USD ($)
Mar. 22, 2018
USD ($)
Feb. 20, 2018
USD ($)
Sep. 28, 2019
USD ($)
revision
Sep. 29, 2018
USD ($)
Sep. 28, 2019
USD ($)
revision
Sep. 29, 2018
USD ($)
Sep. 15, 2019
USD ($)
Dec. 29, 2018
USD ($)
Feb. 27, 2018
USD ($)
Schedule Of Debt Instruments [Line Items]                    
Notes payable       $ 232,300,000   $ 232,300,000     $ 186,300,000  
Commercial paper outstanding       218,800,000   218,800,000     177,100,000  
Other notes payable       13,500,000   13,500,000     $ 9,200,000  
Loss on early extinguishment of debt       0 $ 0 0 $ 7,800,000      
Proceeds from sale of unsecured long-term notes           $ 0 $ 395,400,000      
Five-year Multi-Currency Revolving Credit Facility                    
Schedule Of Debt Instruments [Line Items]                    
Debt maturity, term 5 years         5 years        
Revolving credit facility, amount available $ 800,000,000             $ 700,000,000    
Revolving credit facility, outstanding amount       $ 0   $ 0        
Number of allowed revisions to debt ratios | revision       2   2        
Actual debt-to-capital ratio       0.21   0.21        
Actual debt-to-income ratio       0.96   0.96        
Five-year Multi-Currency Revolving Credit Facility | Maximum                    
Schedule Of Debt Instruments [Line Items]                    
Maximum limit of required debt-to-capital ratio       0.60   0.60        
Maximum limit of required debt-to-income ratio       3.50   3.50        
Five-year Multi-Currency Revolving Credit Facility | Maximum | Material Acquisition                    
Schedule Of Debt Instruments [Line Items]                    
Maximum limit of required debt-to-capital ratio       0.65   0.65        
Maximum limit of required debt-to-income ratio       4.00   4.00        
Unsecured Notes Due 2019 - 6.70%                    
Schedule Of Debt Instruments [Line Items]                    
Debt instrument, face amount     $ 200,000,000              
Unsecured notes, interest rate     6.70%              
2019 Notes                    
Schedule Of Debt Instruments [Line Items]                    
Debt instrument, repurchase amount                   $ 26,100,000
Payment for debt extinguishment   $ 209,100,000                
Accrued interest   1,500,000                
Loss on early extinguishment of debt   $ 7,800,000                
4.10% Unsecured Notes Due 2048                    
Schedule Of Debt Instruments [Line Items]                    
Debt instrument, face amount     $ 400,000,000              
Unsecured notes, interest rate     4.10%              
Proceeds from sale of unsecured long-term notes     $ 395,400,000              
Transaction costs     $ 3,500,000