CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	3 Months Ended
	Jul. 27, 2012	Jul. 29, 2011
Cash flows from operating activities:
Net income	$ 63.8	$ 139.5
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	82.4	68.5
Stock-based compensation	79.2	58.1
Accretion of discount and issuance costs on Notes	14.3	13.7
Deferred income taxes	(18.0)	(23.4)
Tax benefit (charge) from stock-based compensation	(8.8)	28.7
Excess tax benefit from stock-based compensation	(4.9)	(32.1)
Other non-cash items, net	(6.0)	(7.2)
Changes in assets and liabilities, net of acquisition of business:
Accounts receivable	244.2	145.0
Inventories	(42.2)	6.8
Other operating assets	(27.1)	(10.4)
Accounts payable	41.9	22.8
Accrued compensation and other current liabilities	(146.7)	(248.3)
Deferred revenue	(47.0)	66.7
Other operating liabilities	4.1	12.2
Net cash provided by operating activities	229.2	240.6
Cash flows from investing activities:
Purchases of investments	(628.0)	(564.9)
Redemptions of investments	561.9	810.7
Purchases of property and equipment	(61.9)	(98.3)
Acquisition of business	0	(480.0)
Other investing activities, net	1.3	1.7
Net cash used in investing activities	(126.7)	(330.8)
Cash flows from financing activities:
Issuance of common stock	35.0	46.6
Repurchase and retirement of common stock	(150.0)	(200.0)
Excess tax benefit from stock-based compensation	4.9	32.1
Other financing activities, net	(2.0)	0.3
Net cash used in financing activities	(112.1)	(121.0)
Effect of exchange rate changes on cash and cash equivalents	(10.8)	(2.9)
Net decrease in cash and cash equivalents	(20.4)	(214.1)
Cash and cash equivalents:
Beginning of period	1,549.8	2,757.3
End of period	$ 1,529.4	$ 2,543.2