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Loans, overdrafts and long-term debt - Additional Information (Details)
3 Months Ended 9 Months Ended
Sep. 27, 2019
USD ($)
Oct. 30, 2021
USD ($)
Oct. 31, 2020
USD ($)
May 02, 2020
USD ($)
Oct. 30, 2021
USD ($)
Oct. 31, 2020
USD ($)
Jul. 28, 2021
USD ($)
Jan. 30, 2021
USD ($)
May 19, 2014
USD ($)
Debt Instrument [Line Items]                  
Proceeds from revolving credit facilities         $ 0 $ 900,000,000.0      
Senior Unsecured Notes Due in 2024 | Senior Unsecured Notes                  
Debt Instrument [Line Items]                  
Repayments of senior debt $ 239,600,000                
Redemption price per $1,000 of principal amount 950.00                
Unamortized debt issuance costs   $ 600,000 $ 900,000   600,000 900,000   $ 900,000  
Amortization of financing costs   100,000 100,000   300,000 200,000      
Senior Asset-Based Credit Facility | Line of Credit                  
Debt Instrument [Line Items]                  
Unamortized debt issuance costs   8,700,000 6,800,000   8,700,000 6,800,000   $ 6,400,000  
Amortization of financing costs   500,000 $ 400,000   1,600,000 $ 1,300,000      
Revolving Credit Facility | Senior Asset-Based Credit Facility | Line of Credit                  
Debt Instrument [Line Items]                  
Credit facility, maximum borrowing capacity 1,500,000,000                
Additional borrowing capacity             $ 600,000,000    
Debt issuance costs   12,600,000     12,600,000   $ 3,900,000    
Letters of credit outstanding   18,800,000     18,800,000        
Available borrowing capacity   1,200,000,000     $ 1,200,000,000        
Proceeds from revolving credit facilities       $ 900,000,000          
Debt instrument, covenant, minimum coverage ratio         1.00        
Debt covenant, fixed covenant ratio threshold   $ 126,000,000     $ 126,000,000        
Term Loan Facility | Senior Asset-Based Credit Facility | Line of Credit                  
Debt Instrument [Line Items]                  
Face amount $ 100,000,000                
Signet UK Finance plc | Senior Unsecured Notes Due in 2024 | Senior Unsecured Notes                  
Debt Instrument [Line Items]                  
Face amount                 $ 400,000,000
Stated interest rate                 4.70%