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Debt - Credit Agreement (Details)
$ in Millions
3 Months Ended 6 Months Ended
Feb. 28, 2020
Jun. 26, 2021
USD ($)
Jun. 26, 2021
USD ($)
Jun. 27, 2020
Dec. 26, 2020
USD ($)
Debt Instrument [Line Items]          
Debt Instrument, Covenant, Consolidated Leverage Ratio       3.75%  
Unused lines of credit   $ 205.3 $ 205.3    
Period 1 [Member]          
Debt Instrument [Line Items]          
Debt Instrument, Covenant, Consolidated Leverage Ratio 5.75%        
Period 2 [Member]          
Debt Instrument [Line Items]          
Debt Instrument, Covenant, Consolidated Leverage Ratio 5.25%        
Period 3 [Member]          
Debt Instrument [Line Items]          
Debt Instrument, Covenant, Consolidated Leverage Ratio 4.50%        
Period 4 [Member]          
Debt Instrument [Line Items]          
Debt Instrument, Covenant, Consolidated Leverage Ratio 4.00%        
Period 5 [Member]          
Debt Instrument [Line Items]          
Debt Instrument, Covenant, Consolidated Leverage Ratio 3.75%        
Credit agreement          
Debt Instrument [Line Items]          
Line of Credit Facility, Current Borrowing Capacity   650.0 650.0    
Line of Credit Facility, Maximum Borrowing Capacity   850.0 $ 850.0    
Line of Credit Facility, Number of Occasions Permitted to Increase Borrowing Capacity     3    
Line of Credit Facility, Additional Borrowing Capacity   200.0 $ 200.0    
Unused lines of credit   163.7 163.7    
Credit agreement   $ 468.1 $ 468.1   $ 423.3
Credit agreement | LIBOR          
Debt Instrument [Line Items]          
Debt Instrument, Basis Spread on Variable Rate   163.00%      
Weighted average interest rate on LIBOR-based borrowings   1.70% 1.70%    
Credit agreement | Fed Funds          
Debt Instrument [Line Items]          
Derivative, Basis Spread on Variable Rate   0.50% 0.50%    
Credit agreement | Letter of Credit [Member]          
Debt Instrument [Line Items]          
Line of Credit Facility, Maximum Borrowing Capacity   $ 50.0 $ 50.0    
Credit agreement | Swingline [Member]          
Debt Instrument [Line Items]          
Line of Credit Facility, Maximum Borrowing Capacity   100.0 100.0    
Credit agreement | Subsidiaries [Member]          
Debt Instrument [Line Items]          
Line of Credit Facility, Maximum Borrowing Capacity   325.0 $ 325.0    
Credit agreement | Minimum          
Debt Instrument [Line Items]          
Debt Instrument, Basis Spread on Variable Rate     0.375%    
Line of Credit Facility, Commitment Fee Percentage     0.15%    
Credit agreement | Minimum | LIBOR          
Debt Instrument [Line Items]          
Debt Instrument, Basis Spread on Variable Rate     1.375%    
Credit agreement | Maximum          
Debt Instrument [Line Items]          
Debt Instrument, Basis Spread on Variable Rate     0.875%    
Line of Credit Facility, Commitment Fee Percentage     0.275%    
Credit agreement | Maximum | LIBOR          
Debt Instrument [Line Items]          
Debt Instrument, Basis Spread on Variable Rate     1.875%    
Credit agreement | Euro          
Debt Instrument [Line Items]          
Credit agreement   96.6 $ 96.6   $ 160.3
Uncommitted Lines of credit          
Debt Instrument [Line Items]          
Unused lines of credit   $ 41.6 $ 41.6