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Short-term and Long-term Debt - Narratve (Detail) - USD ($)
12 Months Ended
Mar. 22, 2018
Feb. 20, 2018
Dec. 28, 2019
Dec. 29, 2018
Dec. 30, 2017
Sep. 16, 2019
Sep. 15, 2019
Schedule Of Debt Instruments [Line Items]              
Long-term debt and notes payable maturity, 2020     $ 202,900,000        
Long-term debt and notes payable maturity, 2021     250,000,000        
Long-term debt and notes payable maturity, 2022     0        
Long-term debt and notes payable maturity, 2023     0        
Long-term debt and notes payable maturity, 2024     $ 0        
Weighted-average interest rate     2.23% 3.21%      
Loss on early extinguishment of debt     $ 0 $ 7,800,000 $ 0    
Proceeds from sale of unsecured long-term notes     0 395,400,000 $ 297,800,000    
Notes Payable              
Schedule Of Debt Instruments [Line Items]              
Average debt instrument amount outstanding     $ 175,000,000.0 $ 167,700,000      
Weighted-average interest rate     2.87% 2.84%      
Commercial Paper              
Schedule Of Debt Instruments [Line Items]              
Average debt instrument amount outstanding     $ 162,200,000 $ 154,900,000      
Weighted-average interest rate     2.27% 2.03%      
Unsecured Notes Due 2019              
Schedule Of Debt Instruments [Line Items]              
Debt instrument, face amount   $ 200,000,000          
Unsecured notes, interest rate   6.70%          
Notes 2019              
Schedule Of Debt Instruments [Line Items]              
Debt repurchase amount   $ 26,100,000          
Payment for debt extinguishment $ 209,100,000            
Interest expense 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% 4.10%        
Proceeds from sale of unsecured long-term notes   $ 395,400,000          
Transaction costs   $ 3,500,000          
Five-year Multi-Currency Revolving Credit Facility              
Schedule Of Debt Instruments [Line Items]              
Debt maturity term     5 years        
Revolving credit facility, amount available           $ 800,000,000 $ 700,000,000
Revolving credit facility, outstanding amount     $ 0        
Actual debt-to-capital ratio     0.20        
Actual debt-to-income ratio     0.92        
Five-year Multi-Currency Revolving Credit Facility | Maximum              
Schedule Of Debt Instruments [Line Items]              
Maximum limit of required debt-to-capital ratio     0.60        
Maximum limit of required debt-to-income ratio     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        
Maximum limit of required debt-to-income ratio     4.00