Revenue Recognition - Summary of Net Sales by Product Type and Services (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 28, 2023	Jan. 29, 2022	Jan. 30, 2021
Disaggregation Of Revenue [Line Items]
Net sales	$ 6,035,967	$ 5,807,149	$ 4,920,202
Consumables
Disaggregation Of Revenue [Line Items]
Net sales	2,859,602	2,533,755	2,123,499
Supplies and companion animals
Disaggregation Of Revenue [Line Items]
Net sales	2,370,913	2,603,104	2,328,663
Services and other
Disaggregation Of Revenue [Line Items]
Net sales	$ 805,452	$ 670,290	$ 468,040