SCHEDULE II (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jan. 31, 2014		Jan. 31, 2013		Jan. 31, 2012
Allowance for doubtful accounts
Balance at the Beginning of Year	$ 5.6		$ 5.5		$ 4.2
Valuation Allowances and Reserves, Charged to Cost and Expense	1.3		1.5		2.4
Deductions and Write-Offs	2.0		1.4		1.1
Balance at End of Year	4.9		5.6		5.5
Product returns reserves
Balance at the Beginning of Year	4.9		5.8		10.6
Valuation Allowances and Reserves, Charged to Cost and Expense	23.1		25.8		32.7
Deductions and Write-Offs	24.0		26.7		37.5
Balance at End of Year	4.0		4.9		5.8
Partner Program reserves
Balance at the Beginning of Year	48.3	[1]	36.5	[1]	37.9	[1]
Valuation Allowances and Reserves, Charged to Cost and Expense	278.6	[1]	286.9	[1]	214.0	[1]
Deductions and Write-Offs	288.5	[1]	275.1	[1]	215.4	[1]
Balance at End of Year	38.4	[1]	48.3	[1]	36.5	[1]
Restructuring
Balance at the Beginning of Year	8.9		2.4		8.6
Valuation Allowances and Reserves, Charged to Cost and Expense	12.8		45.1		0
Deductions and Write-Offs	16.1		38.6		6.2
Balance at End of Year	$ 5.6		$ 8.9		$ 2.4

[1] The partner program reserves balance impacts "Accounts receivable, net" or "Accounts payable" on the accompanying Consolidated Balance Sheets.