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Debt (Details) - USD ($)
9 Months Ended
Oct. 29, 2018
Sep. 27, 2018
Sep. 30, 2018
Sep. 30, 2017
Debt Instrument [Line Items]        
Repayment of debt     $ 23,125,000 $ 1,250,000
Senior Notes Due 2028 [Member] | Senior Notes [Member]        
Debt Instrument [Line Items]        
Debt instrument, face amount   $ 550,000,000    
Interest rate   4.55%    
Proceeds from sale of Notes   $ 543,000,000    
Subsequent Event [Member]        
Debt Instrument [Line Items]        
Payment of additional capital to insurance subsidiaries $ 150,000,000      
Subsequent Event [Member] | Senior Notes Due June 15, 2019 [Member] | Senior Notes [Member]        
Debt Instrument [Line Items]        
Interest rate 9.25%      
Repayment of debt $ 293,000,000      
Payment of make-whole premium plus accrued and unpaid interest $ 10,700,000