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Senior Notes (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 30, 2019
Mar. 30, 2019
Dec. 29, 2018
Mar. 31, 2018
Aug. 14, 2017
Debt Instrument [Line Items]          
Letters of Credit Outstanding, Amount $ 35.4 $ 35.4 $ 33.5 $ 42.8  
Senior Notes $ 150.0 $ 150.0 $ 150.0 $ 150.0 $ 150.0
Senior Notes, Maturity Date Aug. 14, 2029        
Senior Notes, Interest Rate 3.70% 3.70%      
Shelf Note - Amount $ 150.0 $ 150.0      
Shelf Notes - Maximum Maturity Date Range - in years 12        
Shelf Notes - Maximum Issuance Date August 14, 2020        
Debt Instrument, Percentage of Principal Amount Redeemable 1        
Shelf Notes - Additional Interest Rate 0.005        
Debt Instrument, Covenant Compliance all        
Amount of incremental credit facility which will result in modification of debt covenants   100      
Number of Financial Covenants [Member]          
Debt Instrument [Line Items]          
Debt Instrument, Covenant Description   2      
Fixed Charge Coverage Ratio Minimum Requirement [Member]          
Debt Instrument [Line Items]          
Debt Instrument, Covenant Description   2.00      
Leverage Ratio Maximum Requirement [Member]          
Debt Instrument [Line Items]          
Debt Instrument, Covenant Description   4.00