Other Postretirement Benefit Plans - Reconciliation of AOCI (Details) - Other Benefits $ in Thousands	12 Months Ended
	Jan. 30, 2021 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Net (gain) loss	$ (1,216)
Amortization of prior service cost	921
Amortization of net actuarial loss	(128)
Total Recognized in Other Comprehensive Income	(423)
Total Recognized in Net Periodic Benefit Cost and Other Comprehensive Income	$ (1,003)