Investments, Equity Investments (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Sep. 28, 2019	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018	Dec. 29, 2018
Schedule of Investments [Line Items]
Marketable Securities	$ 352		$ 352		$ 1,440
Cost Method Investments	3,287		3,287		2,978
Equity Method Investments	1,180		1,180		1,624
Equity Investments	4,819		4,819		$ 6,042
Mark to market on marketable equity securities1	114	$ 8	188	$ 379
Observable price adjustments on non-marketable	84	43	100	191
Impairments	(17)	(328)	(79)	(372)
Other Net Equity Investments	137	202	713	167
Gain (Loss) on Investments	318	(75)	922	365
Net gains (losses) recognized during the period on equity securities	281	215	366	808
Less: Net (gains) losses recognized during the period on equity securities sold during the period	(54)	(225)	(321)	(463)
Unrealized gains (losses) recognized during the reporting period on equity securities still held at the reporting date	227	(10)	45	345
IM Flash Technologies, LLC [Member]
Schedule of Investments [Line Items]
Equity Method Investments	1,100		1,100
Related Party Transaction, Purchases from Related Party	$ 140	$ 97	$ 496	$ 324

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Observable price adjustments on non-marketable

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Other Net Equity Investments

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Amount, after adjustment, of cost-method investment. Adjustments include, but are not limited to, dividends received in excess of earnings after date of investment that are considered a return of investment and other than temporary impairments.

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Amount of unrealized and realized gain (loss) on investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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Amount of realized gain (loss) from sale of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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The amount by which the fair value of an investment is less than the amortized cost basis or carrying amount of that investment at the balance sheet date and the decline in fair value is deemed to be other than temporary, before considering whether or not such amount is recognized in earnings or other comprehensive income.

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Amount of unrealized and realized gain (loss) on investment in marketable security, excluding other-than-temporary impairment (OTTI).

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Purchases during the period (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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