Consolidated Statements Of Cash Flows (USD $) In Millions	3 Months Ended
	Jul. 29, 2011	Jul. 30, 2010
Cash flows from operating activities:
Net income	$ 139.5	$ 150.7
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	68.5	40.7
Stock-based compensation	58.1	44.3
Accretion of discount and issuance costs on notes	13.7	12.9
Unrealized losses (gains) on derivative activities	(6.7)	10.8
Deferred income taxes	(23.4)	11.9
Tax benefit (charges) from stock-based compensation	28.7	(12.0)
Excess tax benefit from stock-based compensation	(32.1)	0
Other non-cash items, net	(0.5)	(0.1)
Changes in assets and liabilities, net of acquisition of businesses:
Accounts receivable	145.0	91.6
Inventories	6.8	25.0
Other operating assets	(10.4)	9.9
Accounts payable	22.8	(34.4)
Accrued compensation and other current liabilities	(248.3)	(221.6)
Deferred revenue	66.7	25.7
Other operating liabilities	12.2	21.9
Net cash provided by operating activities	240.6	177.3
Cash flows from investing activities:
Purchases of investments	(564.9)	(726.1)
Redemptions of investments	810.7	432.2
Purchases of property and equipment	(98.3)	(40.2)
Acquisition of businesses, net of cash acquired	(480.0)	(74.9)
Other investing activities, net	1.7	0.1
Net cash used in investing activities	(330.8)	(408.9)
Cash flows from financing activities:
Issuance of common stock	46.6	139.9
Repurchase and retirement of common stock	(200.0)	0
Excess tax benefit from stock-based compensation	32.1	0
Other financing activities	0.3	0
Net cash provided by (used in) financing activities	(121.0)	139.9
Effect of exchange rate changes on cash and cash equivalents	(2.9)	(1.3)
Net decrease in cash and cash equivalents	(214.1)	(93.0)
Cash and cash equivalents:
Beginning of period	2,757.3	1,705.0
End of period	$ 2,543.2	$ 1,612.0