CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Jan. 02, 2026	Jan. 03, 2025	Dec. 29, 2023
Statement of Cash Flows [Abstract]
Net income	$ 782,570	$ 521,267	$ 207,765
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	29,055	28,803	25,717
Impairment of long-lived assets	0	64,391	0
Stock-based compensation	112,983	93,836	106,345
Non-cash lease expense	24,229	27,461	28,976
Deferred taxes	126,237	(59,458)	(133,209)
Acquired in-process research and development technology	11,999	50,750	128,500
Other, net	(11,609)	(13,626)	(16,797)
Changes in operating assets and liabilities:
Trade receivables, net	(21,398)	(27,950)	(22,623)
Inventory	12,225	5,453	(12,977)
Prepaid expenses and other assets	(133,771)	31,079	(29,824)
Accrued collaboration liabilities	1,899	(149)	1,345
Accounts payable and other liabilities	(50,152)	(21,886)	50,106
Net cash provided by operating activities	884,267	699,971	333,324
Cash flows from investing activities:
Purchases of marketable securities	(632,497)	(927,905)	(902,468)
Proceeds from maturities and sales of marketable securities	1,022,866	877,307	1,038,482
Purchases of property, equipment and other, net	(8,429)	(28,435)	(40,469)
Acquired in-process research and development technology	(31,499)	(37,750)	(122,500)
Net cash provided by (used in) investing activities	350,441	(116,783)	(26,955)
Cash flows from financing activities:
Payments for repurchases of common stock	(947,511)	(652,033)	(550,378)
Proceeds from issuance of common stock under the equity incentive plan and stock purchase plan	49,137	61,850	33,448
Taxes paid related to net share settlement of equity awards	(71,220)	(38,625)	(29,122)
Net cash used in financing activities	(969,594)	(628,808)	(546,052)
Net increase (decrease) in cash and cash equivalents	265,114	(45,620)	(239,683)
Cash and cash equivalents at beginning of period	217,374	262,994	502,677
Cash and cash equivalents at end of period	482,488	217,374	262,994
Supplemental cash flow disclosures:
Net cash paid for income taxes	155,296	170,482	185,658
Non-cash operating activities:
Right-of-use assets obtained in exchange for lease obligations	0	15,313	16,623
Impairment of right-of-use assets	0	59,735	0
Non-cash investing activity:
Unpaid liabilities incurred for purchases of in-process research and development technology	0	19,500	6,500
Unpaid liabilities incurred for purchases of investment	$ 21,825	$ 0	$ 0