Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Dec. 27, 2014		Dec. 28, 2013
Cash flows from operating activities:
Net income	$ 513,593		$ 474,361
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	40,857		41,604
Amortization	15,556		14,828
Stock-based compensation	79,900		68,353
Net (gain) loss on sale of available-for-sale securities	(5,508)		277
Amortization of debt discounts	9,014		12,144
Provision for deferred income taxes	19,712		70,168
Excess tax benefit from stock-based compensation	(16,669)		(20,248)
Others	0		(1,512)
Changes in assets and liabilities:
Accounts receivable, net	80,337		21,927
Inventories	(12,299)		(5,208)
Prepaid expenses and other current assets	(11,703)		(7,929)
Other assets	(322)		(15,695)
Accounts payable	(91,464)		17,357
Accrued liabilities	1,640		28,303
Income taxes payable	5,710		(77,905)
Deferred income on shipments to distributors	(3,613)		(5,283)
Net cash provided by operating activities	624,741		615,542
Cash flows from investing activities:
Purchases of available-for-sale securities	(2,112,128)		(3,152,726)
Proceeds from sale and maturity of available-for-sale securities	2,646,410		2,758,941
Purchases of property, plant and equipment	(23,682)		(30,717)
Other investing activities	(7,440)		27,092
Net cash provided by (used in) investing activities	503,160		(397,410)
Cash flows from financing activities:
Repurchases of common stock	(476,012)		(167,121)
Proceeds from issuance of common stock through various stock plans, net	19,338		137,363
Payment of dividends to stockholders	(230,550)		(200,301)
Excess tax benefit from stock-based compensation	16,669		20,248
Net cash used in financing activities	(670,555)		(209,811)
Net increase in cash and cash equivalents	457,346		8,321
Cash and cash equivalents at beginning of period	973,677	[1]	623,558
Cash and cash equivalents at end of period	1,431,023		631,879
Supplemental disclosure of cash flow information:
Interest paid	28,776		26,526
Income taxes paid, net	$ 41,252		$ 67,335

[1] Derived from audited financial statements