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Pension Plans and Other Retirement Benefits - Weighted Average Assumptions for Obligation (Details)
Jan. 30, 2021
Feb. 01, 2020
Sep. 30, 2018
Funded Plan      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 3.20% 3.30% 4.40%
Rate of compensation increase 4.00% 4.00%  
Unfunded Plan      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate 2.80% 3.10%  
Rate of compensation increase 4.00% 4.00%