Fair Value - Assets and Liabilities Measured At Fair Value On Recurring Basis (Details) - USD ($) $ in Millions	Jul. 29, 2023	Jul. 30, 2022
Assets:
Available-for-sale debt investments	$ 15,592	$ 11,947
Marketable equity securities	431	241
Derivative assets	32	78
Total	25,214	17,813
Liabilities:
Derivative liabilities	75	89
Total	75	89
Money market funds
Assets:
Other assets	1,313	1,500
U.S. government securities
Assets:
Available-for-sale debt investments	3,526	1,238
U.S. government agency securities
Assets:
Available-for-sale debt investments	423	138
Non-U.S. government and agency securities
Assets:
Available-for-sale debt investments	363	272
Corporate debt securities
Assets:
Available-for-sale debt investments	6,914	7,818
U.S. agency mortgage-backed securities
Assets:
Available-for-sale debt investments	2,205	1,976
Commercial paper
Assets:
Available-for-sale debt investments	1,484	255
Certificates of deposit
Assets:
Available-for-sale debt investments	677	250
Money market funds
Assets:
Cash equivalents	6,496	3,930
Other current assets	188	0
Commercial paper
Assets:
Cash equivalents	1,090	72
Certificates of deposit
Assets:
Cash equivalents	47	32
Corporate debt securities
Assets:
Cash equivalents	25	1
U.S. government securities
Assets:
Cash equivalents	0	12
Level 1
Assets:
Marketable equity securities	431	241
Derivative assets	0	0
Total	8,428	5,671
Liabilities:
Derivative liabilities	0	0
Total	0	0
Level 1 \| Money market funds
Assets:
Other assets	1,313	1,500
Level 1 \| U.S. government securities
Assets:
Available-for-sale debt investments	0	0
Level 1 \| U.S. government agency securities
Assets:
Available-for-sale debt investments	0	0
Level 1 \| Non-U.S. government and agency securities
Assets:
Available-for-sale debt investments	0	0
Level 1 \| Corporate debt securities
Assets:
Available-for-sale debt investments	0	0
Level 1 \| U.S. agency mortgage-backed securities
Assets:
Available-for-sale debt investments	0	0
Level 1 \| Commercial paper
Assets:
Available-for-sale debt investments	0	0
Level 1 \| Certificates of deposit
Assets:
Available-for-sale debt investments	0	0
Level 1 \| Money market funds
Assets:
Cash equivalents	6,496	3,930
Other current assets	188	0
Level 1 \| Commercial paper
Assets:
Cash equivalents	0	0
Level 1 \| Certificates of deposit
Assets:
Cash equivalents	0	0
Level 1 \| Corporate debt securities
Assets:
Cash equivalents	0	0
Level 1 \| U.S. government securities
Assets:
Cash equivalents	0	0
Level 2
Assets:
Marketable equity securities	0	0
Derivative assets	32	78
Total	16,786	12,142
Liabilities:
Derivative liabilities	75	89
Total	75	89
Level 2 \| Money market funds
Assets:
Other assets	0	0
Level 2 \| U.S. government securities
Assets:
Available-for-sale debt investments	3,526	1,238
Level 2 \| U.S. government agency securities
Assets:
Available-for-sale debt investments	423	138
Level 2 \| Non-U.S. government and agency securities
Assets:
Available-for-sale debt investments	363	272
Level 2 \| Corporate debt securities
Assets:
Available-for-sale debt investments	6,914	7,818
Level 2 \| U.S. agency mortgage-backed securities
Assets:
Available-for-sale debt investments	2,205	1,976
Level 2 \| Commercial paper
Assets:
Available-for-sale debt investments	1,484	255
Level 2 \| Certificates of deposit
Assets:
Available-for-sale debt investments	677	250
Level 2 \| Money market funds
Assets:
Cash equivalents	0	0
Other current assets	0	0
Level 2 \| Commercial paper
Assets:
Cash equivalents	1,090	72
Level 2 \| Certificates of deposit
Assets:
Cash equivalents	47	32
Level 2 \| Corporate debt securities
Assets:
Cash equivalents	25	1
Level 2 \| U.S. government securities
Assets:
Cash equivalents	$ 0	$ 12

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