Accrued Insurance Claims - Narratives (Details)	6 Months Ended
	Jul. 25, 2020 USD ($) state
Accrued Insurance Claims [Line Items]
Insurance Liability, Annual Retained Risk of Loss, Under Employee Health Plan Per Participant, Maximum Threshold	$ 475,000
Number of states with state-sponsored insurance fund | state	2
Insurance liability, annual retained risk loss	$ 450,000
Decrease in accrued insurance claims	7,800,000
Insurance Coverage Treshold Per Policy	5,000,000.0
Treshold One
Accrued Insurance Claims [Line Items]
Aggregate stop loss coverage for automobile liability, general liability, and workers' compensation claims before adjustment	85,800,000
Treshold Two
Accrued Insurance Claims [Line Items]
Aggregate stop loss coverage for automobile liability, general liability, and workers' compensation claims before adjustment	11,500,000
Treshold Three
Accrued Insurance Claims [Line Items]
Aggregate stop loss coverage for automobile liability, general liability, and workers' compensation claims before adjustment	10,000,000.0
Maximum
Accrued Insurance Claims [Line Items]
Retained risk of loss, general liability and workers' compensation, maximum automobile liability	$ 1,000,000.0