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Senior Notes (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 30, 2017
Dec. 30, 2017
Dec. 31, 2016
Debt Instrument [Line Items]      
Senior Notes $ 150 $ 150 $ 0
Senior Notes - Maturity Date Aug. 14, 2029    
Senior Notes - Interest Rate 3.70% 3.70%  
Shelf Notes - Amount $ 150 $ 150  
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      
Debt Instrument [Line Items]      
Debt Instrument, Covenant Description   2  
Fixed Charge Coverage Ratio Minimum Requirement      
Debt Instrument [Line Items]      
Debt Instrument, Covenant Description   2.00  
Leverage Ratio Maximum Requirement      
Debt Instrument [Line Items]      
Debt Instrument, Covenant Description   4.00