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14. Subsequent Events (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 6 Months Ended
Aug. 30, 2018
Aug. 29, 2018
Jul. 29, 2018
Jul. 30, 2017
Jul. 29, 2018
Jul. 30, 2017
14. Subsequent Events (Details) [Line Items]            
Common Stock, Dividends, Per Share, Declared     $ 0.14 $ 0.12 $ 0.28 $ 0.24
Subsequent Event [Member]            
14. Subsequent Events (Details) [Line Items]            
Dividends Payable, Date Declared Aug. 30, 2018          
Common Stock, Dividends, Per Share, Declared $ 0.14          
Dividends Payable, Date to be Paid Sep. 28, 2018          
Dividends Payable, Date of Record Sep. 14, 2018          
Payment for Pension Benefits   $ 3