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Warranty reserve (Tables)
 6 Months Ended
Jul. 30, 2016
Other Liabilities Disclosure [Abstract]  
Other Liabilities
The warranty reserve for diamond and gemstone guarantee, included in accrued expenses and other current liabilities, and other non-current liabilities, is as follows:
 
13 weeks ended
 
26 weeks ended
(in millions)
July 30, 2016
 
August 1, 2015
 
July 30, 2016
 
August 1, 2015
Warranty reserve, beginning of period
$
41.3

 
$
44.6

 
$
41.9

 
$
44.9

Warranty expense
2.8

 
1.9

 
5.7

 
4.9

Utilized(1)
(3.7
)
 
(3.4
)
 
(7.2
)
 
(6.7
)
Warranty reserve, end of period
$
40.4

 
$
43.1

 
$
40.4

 
$
43.1


(1)  
Includes impact of foreign exchange translation.
(in millions)
July 30, 2016
 
January 30, 2016
 
August 1, 2015
Disclosed as:
 
 
 
 
 
Current liabilities
$
12.5

 
$
12.3

 
$
17.6

Non-current liabilities
27.9

 
29.6

 
25.5

Total warranty reserve
$
40.4

 
$
41.9

 
$
43.1