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Warranty reserve (Tables)
 6 Months Ended
Aug. 01, 2015
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 1, 2015
 
August 2, 2014
 
August 1, 2015
 
August 2, 2014
Warranty reserve, beginning of period
$
44.6

 
$
19.4

 
$
44.9

 
$
19.1

Warranty obligations acquired
—

 
28.8

 
—

 
28.8

Warranty expense(1)
1.9

 
2.3

 
4.9

 
4.0

Utilized
(3.4
)
 
(2.4
)
 
(6.7
)
 
(3.8
)
Warranty reserve, end of period
$
43.1

 
$
48.1

 
$
43.1

 
$
48.1
Lease Loss Reserve
(in millions)
August 1, 2015
 
January 31, 2015
 
August 2, 2014
Disclosed as:
 
 
 
 
 
Current liabilities
$
17.6

 
$
17.2

 
$
17.6

Non-current liabilities
25.5

 
27.7

 
30.5

At end of period
$
43.1

 
$
44.9

 
$
48.1