Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Sep. 29, 2012		Oct. 01, 2011
Cash flows from operating activities:
Net income	$ 253,268		$ 280,660
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	28,754		27,094
Amortization	8,455		8,036
Stock-based compensation	36,854		30,666
Net gain on sale of available-for-sale securities	(1,741)		(1,071)
Amortization of debt discount on convertible debentures	7,897		7,732
Derivatives - revaluation and amortization	643		1,091
Tax benefit from exercise of stock options	3,282		6,531
Excess tax benefit from stock-based compensation	(4,766)		(7,928)
Changes in assets and liabilities:
Accounts receivable, net	(7,305)		70,048
Inventories	675		17,271
Deferred income taxes	35,900		30,034
Prepaid expenses and other current assets	5,931		(7,659)
Other assets	(1,750)		9,362
Accounts payable	17,865		(15,067)
Accrued liabilities	1,444		280
Income taxes payable	(6,055)		7,457
Deferred income on shipments to distributors	(19,035)		(27,259)
Net cash provided by operating activities	360,316		437,278
Cash flows from investing activities:
Purchases of available-for-sale securities	(2,020,793)		(2,287,016)
Proceeds from sale and maturity of available-for-sale securities	1,766,216		1,514,431
Purchases of property, plant and equipment	(15,978)		(31,417)
Other investing activities	(27,649)		(34,507)
Net cash used in investing activities	(298,204)		(838,509)
Cash flows from financing activities:
Repurchases of common stock	(178,148)		(177,191)
Proceeds from issuance of common stock through various stock plans	32,888		51,891
Payment of dividends to stockholders	(115,321)		(100,804)
Excess tax benefit from stock-based compensation	4,766		7,928
Net cash used in financing activities	(255,815)		(218,176)
Net decrease in cash and cash equivalents	(193,703)		(619,407)
Cash and cash equivalents at beginning of period	788,822	[1]	1,222,359
Cash and cash equivalents at end of period	595,119		602,952
Supplemental disclosure of cash flow information:
Interest paid	18,651		18,651
Income taxes paid, net of refunds	$ 5,822		$ 3,807

[1] Derived from audited financial statements