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Loans, overdrafts and long-term debt - Additional Information (Details)
3 Months Ended
Sep. 27, 2019
USD ($)
May 01, 2021
USD ($)
May 02, 2020
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   800,000 1,000,000.0 $ 900,000  
Amortization of financing costs   100,000 100,000    
Senior Asset-Based Credit Facility | Line of Credit          
Debt Instrument [Line Items]          
Unamortized debt issuance costs   5,900,000 7,700,000 $ 6,400,000  
Amortization of financing costs   500,000 400,000    
Revolving Credit Facility | Senior Asset-Based Credit Facility | Line of Credit          
Debt Instrument [Line Items]          
Credit facility, maximum borrowing capacity $ 1,500,000,000        
Letters of credit outstanding   19,000,000.0      
Available borrowing capacity   $ 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   $ 124,000,000      
Debt issuance costs   8,700,000      
Term Loan Facility | Senior Asset-Based Credit Facility | Line of Credit          
Debt Instrument [Line Items]          
Face amount   $ 100,000,000.0      
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%