Identifiable Intangible Assets and Goodwill - Finite-lived and Indefinite-lived Intangible Assets Footnotes (Details) $ in Millions	9 Months Ended
	Sep. 27, 2020 USD ($)
Finite-Lived Intangible Assets [Line Items]
Intangible asset impairment charge	$ 900
Braftovi [Member] | Developed technology rights [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets period increase (decrease)	600
Array [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible asset measurement period adjustments	(900)
Array [Member] | Developed technology rights [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible asset measurement period adjustments	200
Array [Member] | Licensing Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets period increase (decrease)	600
Intangible asset measurement period adjustments	1,200
IPR&D [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible asset impairment charge	900	[1]
IPR&D [Member] | Braftovi [Member]
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets, period increase (decrease)	(600)
License Agreements and Other [Member] | Array [Member]
Finite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets, period increase (decrease)	$ (600)

[1] Reflects intangible assets written down to fair value in the first nine months of 2020. Fair value was determined using the income approach, specifically the multi-period excess earnings method, also known as the discounted cash flow method. We started with a forecast of all the expected net cash flows associated with the asset and then applied an asset-specific discount rate to arrive at a net present value amount. Some of the more significant estimates and assumptions inherent in this approach include: the amount and timing of the projected net cash flows, which includes the expected impact of competitive, legal and/or regulatory forces on the product; the discount rate, which seeks to reflect the various risks inherent in the projected cash flows; and the tax rate, which seeks to incorporate the geographic diversity of the projected cash flows.