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Investments and Fair Value Measurements - Changes in Estimated Fair Value of Acquisition Related Contingent Consideration Liabilities (Details) $ in Millions	3 Months Ended	12 Months Ended
	Jan. 02, 2022 USD ($)	Jan. 02, 2022 USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Measurement period adjustment		$ (5)
GRAIL Inc
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Measurement period adjustment	$ (5)
Change in estimated fair value		7
Business Combination, Contingent Consideration, Liability
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Beginning balance		0
Cash payments	15	(15)
Exchange of GRAIL contingent value rights		(145)
Change in estimated fair value		4
Ending balance	$ 615	615
Business Combination, Contingent Consideration, Liability | GRAIL Inc
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Acquisitions		762
Business Combination, Contingent Consideration, Liability | Other Acquisition
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Acquisitions		$ 14

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Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Exchanges

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