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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
Aug. 01, 2020
Aug. 03, 2019
Aug. 01, 2020
Aug. 03, 2019
Funded Plan        
Defined Benefit Plan Disclosure [Line Items]        
Service cost $ 12,540 $ 11,049 $ 25,080 $ 22,098
Interest cost 12,519 12,990 25,038 25,980
Expected return on plan assets (22,242) (18,488) (44,484) (36,976)
Amortization of net actuarial loss and prior service cost 5,509 4,509 11,018 9,018
Total expense 8,326 10,060 16,652 20,120
Unfunded Plan        
Defined Benefit Plan Disclosure [Line Items]        
Service cost 709 552 1,418 1,104
Interest cost 801 967 1,602 1,934
Expected return on plan assets 0 0 0 0
Amortization of net actuarial loss and prior service cost 1,034 936 2,068 1,872
Total expense $ 2,544 $ 2,455 $ 5,088 $ 4,910