Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2018	Apr. 01, 2017	Apr. 02, 2016
Cash flows from operating activities:
Net income	$ 512,381	$ 622,512	$ 550,867
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation	46,438	45,423	50,828
Amortization	50,316	17,203	17,613
Stock-based compensation	153,815	122,858	111,984
Net (gain) loss on sale of available-for-sale securities	689	(3,532)	(370)
Amortization of debt discount on convertible debentures	2,548	11,692	12,048
Provision for deferred income taxes	(353,292)	67,482	44,128
Others	7,500	1,698	2,000
Changes in assets and liabilities:
Accounts receivable, net	(128,229)	63,543	(60,843)
Inventories	(9,176)	(48,244)	52,323
Prepaid expenses and other current assets	(9,727)	(1,000)	(1,261)
Other assets	(22,243)	(20,557)	(11,945)
Accounts payable	(16,691)	10,983	21,422
Accrued liabilities (including executive transition costs)	48,926	33,788	(16,592)
Income taxes payable	566,173	7,473	(11,635)
Deferred income on shipments to distributors	(29,401)	2,809	(14,312)
Net cash provided by operating activities	820,027	934,131	746,255
Cash flows from investing activities:
Purchases of available-for-sale securities	(2,332,140)	(2,817,197)	(3,262,324)
Proceeds from Sale of Available-for-sale Securities	1,161,410	695,030	268,887
Proceeds from maturity of available-for-sale securities	2,194,828	2,709,547	2,613,455
Purchases of property, plant and equipment and other intangibles	(49,918)	(72,051)	(34,004)
Other investing activities	(25,937)	(21,379)	(9,950)
Net cash provided by (used in) investing activities	948,243	493,950	(423,936)
Cash flows from financing activities:
Repurchases of common stock	(474,254)	(522,045)	(443,181)
Taxes paid related to net share settlement of restricted stock units	(60,391)	(35,392)	(34,671)
Proceeds from issuance of common stock through various stock plans	47,454	68,184	85,765
Payment of dividends to stockholders	(353,053)	(332,542)	(318,988)
Repayment of convertible debt	(457,918)	(142,082)	0
Proceeds from issuance of long-term debts	745,175	0	0
Other financing activities	(2,650)	(1,325)	0
Net cash used in financing activities	(555,637)	(965,202)	(711,075)
Net increase (decrease) in cash and cash equivalents	1,212,633	462,879	(388,756)
Cash and cash equivalents at beginning of period	966,695	503,816	892,572
Cash and cash equivalents at end of period	2,179,328	966,695	503,816
Supplemental disclosure of cash flow information:
Interest paid	50,928	41,375	41,375
Income taxes paid (refunded), net	25,343	(6,341)	53,425
Unsettled investment receivables	16,461	21,558	10,242
Unsettled investment payables	$ 5,860	$ 62,199	$ 25,572