CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2012
Operating Activities
Net income	$ 228.8	$ 247.4	$ 285.3
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation, amortization and accretion	128.9	127.8	115.5
Stock-based compensation expense	132.2	156.3	108.8
Excess tax benefits from stock-based compensation	(9.1)	(12.9)	(31.5)
Restructuring charges (benefits), net	12.8	43.9	(1.3)
Other operating activities	(16.1)	6.7	(0.3)
Changes in operating assets and liabilities, net of business combinations:
Accounts receivable	72.3	(98.1)	(71.8)
Deferred income taxes	(49.4)	(28.3)	(33.8)
Prepaid expenses and other current assets	(20.3)	0.1	17.7
Accounts payable and accrued liabilities	(19.6)	(28.3)	2.9
Deferred revenue	66.0	113.3	129.6
Accrued income taxes	37.0	31.2	52.4
Net cash provided by operating activities	563.5	559.1	573.5
Investing Activities
Purchases of marketable securities	(1,214.2)	(1,397.7)	(614.2)
Sales of marketable securities	537.0	332.9	149.5
Maturities of marketable securities	742.1	764.8	409.6
Acquisitions, net of cash acquired	(176.1)	(263.7)	(221.7)
Capital expenditures	(64.2)	(56.4)	(63.0)
Other investing activities	(18.6)	(27.1)	(30.5)
Net cash used in investing activities	(194.0)	(647.2)	(370.3)
Financing Activities
Proceeds from issuance of common stock, net of issuance costs	288.2	220.2	176.1
Repurchase and retirement of common shares	(423.8)	(431.2)	(327.4)
Draws on line of credit	0	110.0	0
Proceeds from debt, net of discount	0	745.6	0
Repayments of line of credit	0	(110.0)	0
Excess tax benefits from stock-based compensation	9.1	12.9	31.5
Other financing activities	0	(6.1)	0
Net cash (used in) provided by financing activities	(126.5)	541.4	(119.8)
Effect of exchange rate changes on cash and cash equivalents	(2.2)	2.0	(1.6)
Net increase in cash and cash equivalents	240.8	455.3	81.8
Cash and cash equivalents at beginning of fiscal year	1,612.2	1,156.9	1,075.1
Cash and cash equivalents at end of fiscal year	1,853.0	1,612.2	1,156.9
Supplemental cash flow information:
Cash paid during the year for interest	20.5	0.4	0
Net cash paid during the year for income taxes	$ 75.7	$ 59.7	$ 63.0