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Warranty reserve (Tables)
 3 Months Ended
Apr. 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
(in millions)
April 30, 2016
 
May 2, 2015
Warranty reserve, beginning of period
$
41.9

 
$
44.9

Warranty expense
2.9

 
3.0

Utilized(1)
(3.5
)
 
(3.3
)
Warranty reserve, end of period
$
41.3

 
$
44.6


(1)  
Includes impact of foreign exchange translation.
(in millions)
April 30, 2016
 
January 30, 2016
 
May 2, 2015
Disclosed as:
 
 
 
 
 
Current liabilities
$
12.4

 
$
12.3

 
$
17.7

Non-current liabilities
28.9

 
29.6

 
26.9

Total warranty reserve
$
41.3

 
$
41.9

 
$
44.6