Balance Sheet Account Details Marketable Securities (Details) - USD ($) $ in Millions	Oct. 02, 2022	Jan. 02, 2022
Marketable Securities [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	$ 72.9	$ 63.7
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(0.8)	(0.1)
Marketable securities, current	51.8	25.7
Marketable securities	20.3	37.9
Total marketable securities	72.1	63.6
Corporate bonds
Marketable Securities [Line Items]
Marketable securities, current	39.8	22.3
Marketable securities	13.7	26.7
Corporate asset-backed securities
Marketable Securities [Line Items]
Marketable securities, current	10.0	3.4
Marketable securities	4.7	11.2
U.S. government securities
Marketable Securities [Line Items]
Marketable securities, current	2.0	0.0
Foreign and other
Marketable Securities [Line Items]
Marketable securities	1.9	0.0
Short-term Investments
Marketable Securities [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	52.4	25.7
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(0.6)	0.0
Short-term Investments \| Corporate bonds
Marketable Securities [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	40.4	22.3
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(0.6)	0.0
Short-term Investments \| Corporate asset-backed securities
Marketable Securities [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	10.0	3.4
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	0.0	0.0
Short-term Investments \| U.S. government securities
Marketable Securities [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	2.0	0.0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	0.0	0.0
Long-Term Investments \| Corporate bonds
Marketable Securities [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	13.8	26.8
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(0.1)	(0.1)
Long-Term Investments \| Corporate asset-backed securities
Marketable Securities [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	4.8	11.2
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(0.1)	0.0
Long-Term Investments \| Foreign and other
Marketable Securities [Line Items]
Debt Securities, Available-for-sale, Amortized Cost	1.9	0.0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	$ 0.0	$ 0.0

Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-Publisher FASB
-Name Accounting Standards Codification
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