Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Dec. 28, 2013		Dec. 29, 2012
Cash flows from operating activities:
Net income	$ 474,361		$ 356,916
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	41,604		42,434
Amortization	14,828		12,878
Stock-based compensation	68,353		56,616
Net (gain) loss on sale of available-for-sale securities	277		(2,489)
Amortization of debt discount on convertible debentures	12,144		11,877
Provision for deferred income taxes	70,168		48,302
Excess tax benefit from stock-based compensation	(20,248)		(6,312)
Others	(1,512)		437
Changes in assets and liabilities:
Accounts receivable, net	21,927		(17,292)
Inventories	(5,208)		(21,018)
Prepaid expenses and other current assets	(7,929)		5,021
Other assets	(15,695)		(6,208)
Accounts payable	17,357		19,953
Accrued liabilities	28,303		3,088
Income taxes payable	(77,905)		(4,334)
Deferred income on shipments to distributors	(5,283)		(16,985)
Net cash provided by operating activities	615,542		482,884
Cash flows from investing activities:
Purchases of available-for-sale securities	(3,152,726)		(2,965,026)
Proceeds from sale and maturity of available-for-sale securities	2,758,941		2,684,994
Purchases of property, plant and equipment	(30,717)		(24,053)
Other investing activities	27,092		(32,349)
Net cash used in investing activities	(397,410)		(336,434)
Cash flows from financing activities:
Repurchases of common stock	(167,121)		(197,750)
Proceeds from issuance of common stock through various stock plans	137,363		51,950
Payment of dividends to stockholders	(200,301)		(172,647)
Excess tax benefit from stock-based compensation	20,248		6,312
Net cash used in financing activities	(209,811)		(312,135)
Net decrease in cash and cash equivalents	8,321		(165,685)
Cash and cash equivalents at beginning of period	623,558	[1]	788,822
Cash and cash equivalents at end of period	631,879		623,137
Supplemental disclosure of cash flow information:
Interest paid	26,526		26,526
Income taxes paid, net of refunds	$ 67,335		$ 6,917

[1] Derived from audited financial statements