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Warranty reserve (Tables)
 6 Months Ended
Jul. 29, 2017
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 29, 2017
 
July 30, 2016
 
July 29, 2017
 
July 30, 2016
Warranty reserve, beginning of period
$
39.2

 
$
41.3

 
$
40.0

 
$
41.9

Warranty expense
2.5

 
2.8

 
4.8

 
5.7

Utilized(1)
(2.4
)
 
(3.7
)
 
(5.5
)
 
(7.2
)
Warranty reserve, end of period
$
39.3

 
$
40.4

 
$
39.3

 
$
40.4


(1)  
Includes impact of foreign exchange translation.
(in millions)
July 29, 2017
 
January 28, 2017
 
July 30, 2016
Disclosed as:
 
 
 
 
 
Current liabilities
$
12.2

 
$
13.0

 
$
12.5

Non-current liabilities
27.1

 
27.0

 
27.9

Total warranty reserve
$
39.3

 
$
40.0

 
$
40.4