Investments (Tables)

9 Months Ended

Oct. 31, 2015

Investments, Debt and Equity Securities [Abstract]

Schedule of available for sale securities

All investments are classified as available-for-sale and include the following:

	October 31, 2015							January 31, 2015							November 1, 2014
(in millions)	Cost		Unrealized Gain (Loss)			Fair Value		Cost		Unrealized Gain (Loss)			Fair Value		Cost		Unrealized Gain (Loss)			Fair Value
US Treasury securities	$	9.2	$	(0.4	)	$	8.8	$	9.7	$	(0.1	)	$	9.6	$	9.7	$	(0.1	)	$	9.6
US government agency securities	2.3		—			2.3		1.4		—			1.4		1.4		(0.1		)	1.3
Corporate bonds and notes	10.5		—			10.5		10.6		0.2			10.8		9.3		—			9.3
Corporate equity securities	3.4		—			3.4		3.5		(0.1		)	3.4		3.3		—			3.3
Total investments	$	25.4	$	(0.4	)	$	25.0	$	25.2	$	—		$	25.2	$	23.7	$	(0.2	)	$	23.5

Investments in debt securities outstanding as of October 31, 2015 mature as follows:

(in millions)	Cost		Fair Value
Less than one year	$	5.3	$	5.1
Year two through year five	8.5		8.4
Year six through year ten	8.2		8.1
After ten years	—		—
Total investment in debt securities	$	22.0	$	21.6