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Investments (Tables)
 12 Months Ended
Feb. 01, 2020
Investments, Debt and Equity Securities [Abstract]  
Schedule of available-for-sale debt securities All investments are classified as available-for-sale and include the following:
 
February 1, 2020
 
February 2, 2019
(in millions)
Cost
 
Unrealized Gain (Loss)
 
Fair Value
 
Cost
 
Unrealized Gain (Loss)
 
Fair Value
US Treasury securities
$
7.2

 
$
—

 
$
7.2

 
$
5.1

 
$
(0.4
)
 
$
4.7

US government agency securities
4.6

 
0.1

 
4.7

 
2.6

 
(0.1
)
 
2.5

Corporate bonds and notes
8.3

 
0.2

 
8.5

 
5.3

 
(0.1
)
 
5.2

Corporate equity securities
—

 
—

 
—

 
2.7

 
(0.3
)
 
2.4

Total investments
$
20.1

 
$
0.3

 
$
20.4

 
$
15.7

 
$
(0.9
)
 
$
14.8


Investments in debt securities outstanding as of February 1, 2020 mature as follows:
(in millions)
Cost
 
Fair Value
Less than one year
$
3.5

 
$
3.5

Year two through year five
16.6

 
16.9

Total investment in debt securities
$
20.1

 
$
20.4