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Accounts Receivable, Net - Portfolio of Accounts Receivable (Details) - USD ($)
$ in Millions
Feb. 02, 2019
Feb. 03, 2018
Jan. 28, 2017
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Accounts receivable, net $ 19.5 $ 692.5  
Accounts receivable, held for sale 4.2 0.0  
Consumer Portfolio Segment      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Accounts receivable, net 0.0 649.4 $ 1,813.3
Other accounts receivable      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Accounts receivable, net 19.5 9.6  
Sterling Jewelers | Consumer Portfolio Segment      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Accounts receivable, net 0.0 649.4  
Zale Jewelry | Consumer Portfolio Segment      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Accounts receivable, net 0.0 33.5  
North America | Consumer Portfolio Segment      
Accounts, Notes, Loans and Financing Receivable [Line Items]      
Accounts receivable, net $ 0.0 $ 682.9