Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Dec. 29, 2012		Dec. 31, 2011
Cash flows from operating activities:
Net income	$ 356,916		$ 407,674
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	42,434		40,956
Amortization	12,878		12,363
Stock-based compensation	56,616		48,509
Net gain on sale of available-for-sale securities	(2,489)		(1,861)
Amortization of debt discount on convertible debentures	11,877		11,629
Derivatives - revaluation and amortization	437		450
Tax benefit from exercise of stock options	5,354		7,039
Excess tax benefit from stock-based compensation	(6,312)		(8,573)
Changes in assets and liabilities:
Accounts receivable, net	(17,292)		75,332
Inventories	(21,018)		19,626
Deferred income taxes	48,302		53,171
Prepaid expenses and other current assets	5,021		(5,498)
Other assets	(6,208)		4,371
Accounts payable	19,953		(399)
Accrued liabilities	3,088		5,363
Income taxes payable	(9,688)		(15,366)
Deferred income on shipments to distributors	(16,985)		(36,538)
Net cash provided by operating activities	482,884		618,248
Cash flows from investing activities:
Purchases of available-for-sale securities	(2,965,026)		(3,420,207)
Proceeds from sale and maturity of available-for-sale securities	2,684,994		2,623,384
Purchases of property, plant and equipment	(24,053)		(50,401)
Other investing activities	(32,349)		(33,886)
Net cash used in investing activities	(336,434)		(881,110)
Cash flows from financing activities:
Repurchases of common stock	(197,750)		(219,638)
Proceeds from issuance of common stock through various stock plans	51,950		63,263
Payment of dividends to stockholders	(172,647)		(150,370)
Excess tax benefit from stock-based compensation	6,312		8,573
Net cash used in financing activities	(312,135)		(298,172)
Net decrease in cash and cash equivalents	(165,685)		(561,034)
Cash and cash equivalents at beginning of period	788,822	[1]	1,222,359
Cash and cash equivalents at end of period	623,137		661,325
Supplemental disclosure of cash flow information:
Interest paid	26,526		26,526
Income taxes paid, net of refunds	$ 6,917		$ 5,085

[1] Derived from audited financial statements