Investments, Available-for-Sale Debt Investments (Detail) - USD ($) $ in Millions	Mar. 28, 2020	Dec. 28, 2019
Debt Securities, Available-for-sale [Line Items]
Adjusted Cost	$ 13,886	$ 6,481
Gross Unrealized Gains	69	63
Gross Unrealized Losses	(12)	(1)
Fair Value	13,943	6,543
Due in 1 year or less	3,443
Due in 1–2 years	1,589
Due in 2–5 years	1,354
Due after 5 years	0
Instruments not due at a single maturity date	7,557
Corporate Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Adjusted Cost	3,656	2,914
Gross Unrealized Gains	46	44
Gross Unrealized Losses	(9)	0
Fair Value	3,693	2,958
Fixed Income Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Adjusted Cost	9,482	3,007
Gross Unrealized Gains	12	15
Gross Unrealized Losses	(2)	(1)
Fair Value	9,492	3,021
Government Debt [Member]
Debt Securities, Available-for-sale [Line Items]
Adjusted Cost	748	560
Gross Unrealized Gains	11	4
Gross Unrealized Losses	(1)	0
Fair Value	$ 758	$ 564

Amount, before tax, of unrealized gain 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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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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Amortized cost of 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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Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in sixth through tenth fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.

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Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in second through fifth fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.

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Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), maturing in next fiscal year following latest fiscal year. Excludes interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.

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Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), without single maturity date and not allocated over maturity grouping.

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Amount of 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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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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