Revenue Recognition - Summary of Net Sales by Product Type and Services (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 29, 2022	Jan. 30, 2021	Feb. 01, 2020
Disaggregation Of Revenue [Line Items]
Net sales	$ 5,807,149	$ 4,920,202	$ 4,434,514
Consumables
Disaggregation Of Revenue [Line Items]
Net sales	2,533,755	2,123,499	2,054,280
Supplies and companion animals
Disaggregation Of Revenue [Line Items]
Net sales	2,603,104	2,328,663	1,938,904
Services and other
Disaggregation Of Revenue [Line Items]
Net sales	$ 670,290	$ 468,040	$ 441,330