Accrued Insurance Claims - Narratives (Details)	6 Months Ended
	Jul. 27, 2019 USD ($) state
Accrued Insurance Claims [Line Items]
Insurance Liability, Annual Retained Risk of Loss, Under Employee Health Plan Per Participant, Maximum Threshold	$ 425,000
Number of states with state-sponsored insurance fund | state	2
Aggregate stop loss coverage for automobile liability, general liability, and workers' compensation claims before adjustment	$ 77,100,000
Insurance liability, annual retained risk loss	400,000
Decrease in accrued insurance claims	(8,700,000)
Maximum
Accrued Insurance Claims [Line Items]
Retained risk of loss, general liability and workers' compensation, maximum automobile liability	$ 1,000,000.0