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Pension Plans and Other Retirement Benefits - Financial Information Related to Funded Defined Benefit Pension Plan and Unfunded Supplemental Pension Plan (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jul. 31, 2021
Aug. 01, 2020
Jul. 31, 2021
Aug. 01, 2020
Funded Plan        
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 12,718 $ 12,540 $ 24,937 $ 25,080
Interest cost 13,188 12,519 26,000 25,038
Expected return on plan assets (23,992) (22,242) (47,984) (44,484)
Amortization of net actuarial loss and prior service cost 4,697 5,509 7,500 11,018
Total expense 6,611 8,326 10,453 16,652
Unfunded Plan        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 755 709 1,510 1,418
Interest cost 780 801 1,560 1,602
Expected return on plan assets 0 0 0 0
Amortization of net actuarial loss and prior service cost 1,155 1,034 2,309 2,068
Total expense $ 2,690 $ 2,544 $ 5,379 $ 5,088