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- Deferred revenue (Detail) - USD ($)
$ in Millions
Oct. 31, 2015
Aug. 01, 2015
Jan. 31, 2015
Nov. 01, 2014
Aug. 02, 2014
Feb. 01, 2014
Deferred Revenue Arrangement [Line Items]            
Voucher promotions and other $ 21.6   $ 22.7 $ 9.4    
Total deferred revenue 838.9   811.9 740.4    
Current liabilities 241.4   248.0 221.6    
Non-current liabilities 597.5   563.9 518.8    
Sterling Jewelers            
Deferred Revenue Arrangement [Line Items]            
ESP deferred revenue 684.7 $ 691.4 668.9 626.3 $ 626.6 $ 601.2
Zale Jewelry            
Deferred Revenue Arrangement [Line Items]            
ESP deferred revenue $ 132.6   $ 120.3 $ 104.7