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Components of Net Periodic Benefit Cost and Other Amounts Recognized in Other Comprehensive Income (Loss) (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Jan. 30, 2016
Jan. 31, 2015
Feb. 01, 2014
Funded Plan      
Defined Benefit Plan Disclosure [Line Items]      
Service cost $ 50,080 $ 40,481 $ 44,623
Interest cost 51,710 49,522 44,654
Expected return on plan assets (78,042) (65,187) (60,474)
Amortization of prior service cost 377    
Amortization of net actuarial loss 33,146 13,848 28,070
Total expense 57,271 38,664 56,873
Net (gain) loss (19,731) 209,091 (89,265)
Amortization of net (loss) (33,146) (13,848) (28,070)
Amortization of prior service cost (377)    
Plan amendment   3,067  
Total recognized in other comprehensive income (loss) (53,254) 198,310 (117,335)
Total recognized in net periodic benefit cost and other comprehensive income (loss) $ 4,017 $ 236,974 $ (60,462)
Discount rate 4.00% 5.00% 4.40%
Expected rate of return on plan assets 6.75% 7.00% 7.00%
Rate of compensation increase 4.00% 4.00% 4.00%
Unfunded Plan      
Defined Benefit Plan Disclosure [Line Items]      
Service cost $ 1,562 $ 1,398 $ 1,716
Interest cost 3,033 3,001 2,447
Amortization of prior service cost   2 3
Amortization of net actuarial loss 3,958 2,146 2,884
Total expense 8,553 6,547 7,050
Net (gain) loss 3,806 19,552 (2,925)
Amortization of net (loss) (3,958) (2,146) (2,884)
Amortization of prior service cost   (2) (3)
Total recognized in other comprehensive income (loss) (152) 17,404 (5,812)
Total recognized in net periodic benefit cost and other comprehensive income (loss) $ 8,401 $ 23,951 $ 1,238
Discount rate 3.70% 4.80% 4.00%
Rate of compensation increase 6.00% 6.00% 6.00%