Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Sep. 28, 2019	Sep. 29, 2018	Sep. 30, 2017
Cash flows from operating activities:
Net income	$ 468,452	$ 405,750
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization of software	42,551	31,123
Amortization - others	22,050	15,477
Stock-based compensation	92,575	70,553
Benefit for deferred income taxes	11,342	4,825
Others	(19,580)	2,475
Changes in assets and liabilities:
Accounts receivable, net	5,523	9,263
Inventories	(14,675)	(6,887)
Prepaid expenses and other current assets	(1,860)	(5,744)
Other assets	(12,539)	(17,616)
Accounts payable	(19,786)	4,525
Accrued liabilities	21	13,116
Income taxes payable	(52,164)	(37,569)
Net cash provided by operating activities	521,910	489,291
Cash flows from investing activities:
Purchases of available-for-sale securities	(671,515)	(819,512)
Proceeds from sale and maturity of available-for-sale and equity securities	1,458,286	780,567
Purchases of property, plant and equipment and software	(62,842)	(40,533)
Other investing activities	(5,453)	(25,277)
Payments to Acquire Businesses, Net of Cash Acquired	(454,613)	(223,535)
Net cash provided by (used in) investing activities	263,863	(328,290)
Cash flows from financing activities:
Payments for Repurchase of Common Stock	(477,245)	(160,536)
Payment, Tax Withholding, Share-based Payment Arrangement	(71,778)	(39,494)
Proceeds from issuance of common stock through various stock plans	19,802	18,416
Payment of dividends to stockholders	(187,445)	(181,752)
Other financing activities	(9,784)	(2,325)
Net cash used in financing activities	(726,450)	(365,691)
Net increase (decrease) in cash and cash equivalents	59,323	(204,690)
Cash and cash equivalents at beginning of period	1,544,490	2,179,328
Cash and cash equivalents at end of period	1,603,813	$ 1,974,638
Supplemental disclosure of cash flow information:
Interest paid	30,513		$ 33,986
Income taxes paid, net	$ 50,332		$ 78,948