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Warranty reserve (Tables)
 6 Months Ended
Aug. 04, 2018
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)
August 4, 2018
 
July 29, 2017
 
August 4, 2018
 
July 29, 2017
Warranty reserve, beginning of period
$
35.6

 
$
39.2

 
$
37.2

 
$
40.0

Warranty expense
4.0

 
2.5

 
5.4

 
4.8

Utilized(1)
(3.2
)
 
(2.4
)
 
(6.2
)
 
(5.5
)
Warranty reserve, end of period
$
36.4

 
$
39.3

 
$
36.4

 
$
39.3


(1)  
Includes impact of foreign exchange translation.
(in millions)
August 4, 2018
 
February 3, 2018
 
July 29, 2017
Disclosed as:
 
 
 
 
 
Current liabilities
$
11.2

 
$
11.5

 
$
12.2

Non-current liabilities
25.2

 
25.7

 
27.1

Total warranty reserve
$
36.4

 
$
37.2

 
$
39.3