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Income Taxes - Narrative (Details) - USD ($)
 12 Months Ended
Jan. 31, 2021
Feb. 02, 2020
Feb. 03, 2019
Tax Credit Carryforward [Line Items]      
Current income tax provision $ 0 $ 0 $ 0
Deferred income tax provision 0 0 0
Decrease in valuation allowance 119,000,000.0    
Decrease in valuation allowance relating to write-offs of attributes utilized by PetSmart 233,776,000 0 0
Increase in valuation allowance relating to state blended tax rate 1,500,000    
Increase in valuation allowance relating to current year activity 106,800,000    
Increase in valuation allowance relating to miscellaneous adjustments 6,500,000    
Decrease in net operating losses due to separate return accounting 890,400,000    
Deferred tax asset with respect to operating loss carryforwards 87,881,000 190,307,000  
Unrecognized tax benefits 0 0  
Proceeds from tax sharing agreement with Parent 23,212,000 $ 17,300,000 $ 0
Tax Sharing Agreement      
Tax Credit Carryforward [Line Items]      
Current receivable from affiliate 30,500,000    
Expiring by 2032      
Tax Credit Carryforward [Line Items]      
Net operating loss carryforwards 25,100,000    
Expiring after 2032      
Tax Credit Carryforward [Line Items]      
Net operating loss carryforwards 792,800,000    
Definitive expiration dates      
Tax Credit Carryforward [Line Items]      
Net operating loss carryforwards 226,600,000    
No expiration      
Tax Credit Carryforward [Line Items]      
Net operating loss carryforwards 566,200,000    
Federal      
Tax Credit Carryforward [Line Items]      
Net operating loss carryforwards 295,800,000    
State Tax Authority      
Tax Credit Carryforward [Line Items]      
Net operating loss carryforwards $ 522,100,000