Available-for-Sale Debt and Equity Investments - Maturities of Available-for-Sale Debt Investments (Details) - USD ($) $ in Millions	Apr. 29, 2023	Jul. 30, 2022
Amortized Cost
Within 1 year	$ 5,821
After 1 year through 5 years	7,340
After 5 years through 10 years	54
After 10 years	2
Mortgage-backed securities with no single maturity	2,221
Amortized Cost	15,438	$ 12,467
Fair Value
Within 1 year	5,762
After 1 year through 5 years	7,067
After 5 years through 10 years	53
After 10 years	2
Mortgage-backed securities with no single maturity	2,014
Fair Value	$ 14,898	$ 11,947

Amortized cost 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 current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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