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Components of Net Periodic Benefit Cost and Other Amounts Recognized in Other Comprehensive Income (Loss) (Detail) - USD ($)
$ in Thousands
3 Months Ended
Apr. 30, 2016
May. 02, 2015
Funded Plan    
Defined Benefit Plan Disclosure [Line Items]    
Service cost $ 11,209 $ 13,055
Interest cost 14,362 12,949
Expected return on plan assets (17,935) (19,493)
Recognized actuarial losses 7,209 8,547
Total expense 14,845 15,058
Unfunded Plan    
Defined Benefit Plan Disclosure [Line Items]    
Service cost 541 693
Interest cost 875 871
Recognized actuarial losses 865 1,379
Total expense $ 2,281 $ 2,943